Home / 728,800.55-1,005,738.09-402,116.57

Finding the Fourth Proportional to 728,800.55, 1,005,738.09 and 402,116.57

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Solution

The fourth proportional to 728,800.55, 1,005,738.09 and 402,116.57 is: 554,917.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,800.55 : 1,005,738.09 = 402,116.57 : x
  2. Step 2: Convert to fraction form
    728,800.55/1,005,738.09 = 402,116.57/x
  3. Step 3: Cross multiply
    728,800.55x = 1,005,738.09 × 402,116.57
  4. Step 4: Simplify right side
    728,800.55x = 404,423,948,304.04
  5. Step 5: Solve for x
    x = 404,423,948,304.04/728,800.55
  6. Step 6: Final answer
    x = 554,917.18

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1.5x scale

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.