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Finding the Fourth Proportional to 317,537.43, 438,186.69 and 172,339.92

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Solution

The fourth proportional to 317,537.43, 438,186.69 and 172,339.92 is: 237,820.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,537.43 : 438,186.69 = 172,339.92 : x
  2. Step 2: Convert to fraction form
    317,537.43/438,186.69 = 172,339.92/x
  3. Step 3: Cross multiply
    317,537.43x = 438,186.69 × 172,339.92
  4. Step 4: Simplify right side
    317,537.43x = 75,517,059,099.66
  5. Step 5: Solve for x
    x = 75,517,059,099.66/317,537.43
  6. Step 6: Final answer
    x = 237,820.97

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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.