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Finding the Fourth Proportional to 317,484.65, 438,129.10 and 172,290.43

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Solution

The fourth proportional to 317,484.65, 438,129.10 and 172,290.43 is: 237,760.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,484.65 : 438,129.10 = 172,290.43 : x
  2. Step 2: Convert to fraction form
    317,484.65/438,129.10 = 172,290.43/x
  3. Step 3: Cross multiply
    317,484.65x = 438,129.10 × 172,290.43
  4. Step 4: Simplify right side
    317,484.65x = 75,485,450,828.40
  5. Step 5: Solve for x
    x = 75,485,450,828.40/317,484.65
  6. Step 6: Final answer
    x = 237,760.95

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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.