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Finding the Fourth Proportional to 317,681.31, 438,407.87 and 172,493.27

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Solution

The fourth proportional to 317,681.31, 438,407.87 and 172,493.27 is: 238,044.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,681.31 : 438,407.87 = 172,493.27 : x
  2. Step 2: Convert to fraction form
    317,681.31/438,407.87 = 172,493.27/x
  3. Step 3: Cross multiply
    317,681.31x = 438,407.87 × 172,493.27
  4. Step 4: Simplify right side
    317,681.31x = 75,622,404,035.53
  5. Step 5: Solve for x
    x = 75,622,404,035.53/317,681.31
  6. Step 6: Final answer
    x = 238,044.86

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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.