Home / 1,315,280,231.20-1,972,920,346.80-395,036,995.60

Finding the Fourth Proportional to 1,315,280,231.20, 1,972,920,346.80 and 395,036,995.60

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Solution

The fourth proportional to 1,315,280,231.20, 1,972,920,346.80 and 395,036,995.60 is: 592,555,493.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,280,231.20 : 1,972,920,346.80 = 395,036,995.60 : x
  2. Step 2: Convert to fraction form
    1,315,280,231.20/1,972,920,346.80 = 395,036,995.60/x
  3. Step 3: Cross multiply
    1,315,280,231.20x = 1,972,920,346.80 × 395,036,995.60
  4. Step 4: Simplify right side
    1,315,280,231.20x = 779,376,526,357,982,080
  5. Step 5: Solve for x
    x = 779,376,526,357,982,080/1,315,280,231.20
  6. Step 6: Final answer
    x = 592,555,493.40

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Half scale
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Double scale
Find fourth proportional to 1,315,280,232.20, 1,972,920,348.30 and 395,036,996.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.