Home / 728,781.20-1,005,715.44-406,491.04

Finding the Fourth Proportional to 728,781.20, 1,005,715.44 and 406,491.04

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Solution

The fourth proportional to 728,781.20, 1,005,715.44 and 406,491.04 is: 560,956.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,781.20 : 1,005,715.44 = 406,491.04 : x
  2. Step 2: Convert to fraction form
    728,781.20/1,005,715.44 = 406,491.04/x
  3. Step 3: Cross multiply
    728,781.20x = 1,005,715.44 × 406,491.04
  4. Step 4: Simplify right side
    728,781.20x = 408,814,316,406.80
  5. Step 5: Solve for x
    x = 408,814,316,406.80/728,781.20
  6. Step 6: Final answer
    x = 560,956.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.