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Finding the Fourth Proportional to 521,691.44, 719,921.20 and 292,247.20

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Solution

The fourth proportional to 521,691.44, 719,921.20 and 292,247.20 is: 403,293.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,691.44 : 719,921.20 = 292,247.20 : x
  2. Step 2: Convert to fraction form
    521,691.44/719,921.20 = 292,247.20/x
  3. Step 3: Cross multiply
    521,691.44x = 719,921.20 × 292,247.20
  4. Step 4: Simplify right side
    521,691.44x = 210,394,955,637.89
  5. Step 5: Solve for x
    x = 210,394,955,637.89/521,691.44
  6. Step 6: Final answer
    x = 403,293.86

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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.