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Finding the Fourth Proportional to 432.31, 648.56 and 124.16

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Solution

The fourth proportional to 432.31, 648.56 and 124.16 is: 186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.31 : 648.56 = 124.16 : x
  2. Step 2: Convert to fraction form
    432.31/648.56 = 124.16/x
  3. Step 3: Cross multiply
    432.31x = 648.56 × 124.16
  4. Step 4: Simplify right side
    432.31x = 80,526.83
  5. Step 5: Solve for x
    x = 80,526.83/432.31
  6. Step 6: Final answer
    x = 186.27

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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.