Home / 809,996.20-1,214,994.30-390,092.20

Finding the Fourth Proportional to 809,996.20, 1,214,994.30 and 390,092.20

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Solution

The fourth proportional to 809,996.20, 1,214,994.30 and 390,092.20 is: 585,138.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,996.20 : 1,214,994.30 = 390,092.20 : x
  2. Step 2: Convert to fraction form
    809,996.20/1,214,994.30 = 390,092.20/x
  3. Step 3: Cross multiply
    809,996.20x = 1,214,994.30 × 390,092.20
  4. Step 4: Simplify right side
    809,996.20x = 473,959,799,474.46
  5. Step 5: Solve for x
    x = 473,959,799,474.46/809,996.20
  6. Step 6: Final answer
    x = 585,138.30

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Double scale
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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.