Home / 728,743.78-1,005,663.08-402,047.90

Finding the Fourth Proportional to 728,743.78, 1,005,663.08 and 402,047.90

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Solution

The fourth proportional to 728,743.78, 1,005,663.08 and 402,047.90 is: 554,824.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,743.78 : 1,005,663.08 = 402,047.90 : x
  2. Step 2: Convert to fraction form
    728,743.78/1,005,663.08 = 402,047.90/x
  3. Step 3: Cross multiply
    728,743.78x = 1,005,663.08 × 402,047.90
  4. Step 4: Simplify right side
    728,743.78x = 404,324,729,421.53
  5. Step 5: Solve for x
    x = 404,324,729,421.53/728,743.78
  6. Step 6: Final answer
    x = 554,824.26

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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.