Home / 728,761.45-1,005,685.94-402,091.28

Finding the Fourth Proportional to 728,761.45, 1,005,685.94 and 402,091.28

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Solution

The fourth proportional to 728,761.45, 1,005,685.94 and 402,091.28 is: 554,883.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,761.45 : 1,005,685.94 = 402,091.28 : x
  2. Step 2: Convert to fraction form
    728,761.45/1,005,685.94 = 402,091.28/x
  3. Step 3: Cross multiply
    728,761.45x = 1,005,685.94 × 402,091.28
  4. Step 4: Simplify right side
    728,761.45x = 404,377,546,892.60
  5. Step 5: Solve for x
    x = 404,377,546,892.60/728,761.45
  6. Step 6: Final answer
    x = 554,883.29

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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.