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Finding the Fourth Proportional to 317,792.70, 438,557.09 and 172,601.32

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Solution

The fourth proportional to 317,792.70, 438,557.09 and 172,601.32 is: 238,191.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,792.70 : 438,557.09 = 172,601.32 : x
  2. Step 2: Convert to fraction form
    317,792.70/438,557.09 = 172,601.32/x
  3. Step 3: Cross multiply
    317,792.70x = 438,557.09 × 172,601.32
  4. Step 4: Simplify right side
    317,792.70x = 75,695,530,127.53
  5. Step 5: Solve for x
    x = 75,695,530,127.53/317,792.70
  6. Step 6: Final answer
    x = 238,191.53

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1.5x scale

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.