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Finding the Fourth Proportional to 438,641.43, 658,024.90 and 135,061.26

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Solution

The fourth proportional to 438,641.43, 658,024.90 and 135,061.26 is: 202,611.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,641.43 : 658,024.90 = 135,061.26 : x
  2. Step 2: Convert to fraction form
    438,641.43/658,024.90 = 135,061.26/x
  3. Step 3: Cross multiply
    438,641.43x = 658,024.90 × 135,061.26
  4. Step 4: Simplify right side
    438,641.43x = 88,873,669,300.13
  5. Step 5: Solve for x
    x = 88,873,669,300.13/438,641.43
  6. Step 6: Final answer
    x = 202,611.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.