Home / 1,387,122.80-2,080,684.20-389,721.20

Finding the Fourth Proportional to 1,387,122.80, 2,080,684.20 and 389,721.20

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Solution

The fourth proportional to 1,387,122.80, 2,080,684.20 and 389,721.20 is: 584,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,122.80 : 2,080,684.20 = 389,721.20 : x
  2. Step 2: Convert to fraction form
    1,387,122.80/2,080,684.20 = 389,721.20/x
  3. Step 3: Cross multiply
    1,387,122.80x = 2,080,684.20 × 389,721.20
  4. Step 4: Simplify right side
    1,387,122.80x = 810,886,743,245.04
  5. Step 5: Solve for x
    x = 810,886,743,245.04/1,387,122.80
  6. Step 6: Final answer
    x = 584,581.80

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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.