Home / 728,742.78-1,005,661.70-402,046.90

Finding the Fourth Proportional to 728,742.78, 1,005,661.70 and 402,046.90

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Solution

The fourth proportional to 728,742.78, 1,005,661.70 and 402,046.90 is: 554,822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,742.78 : 1,005,661.70 = 402,046.90 : x
  2. Step 2: Convert to fraction form
    728,742.78/1,005,661.70 = 402,046.90/x
  3. Step 3: Cross multiply
    728,742.78x = 1,005,661.70 × 402,046.90
  4. Step 4: Simplify right side
    728,742.78x = 404,323,168,933.73
  5. Step 5: Solve for x
    x = 404,323,168,933.73/728,742.78
  6. Step 6: Final answer
    x = 554,822.88

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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.