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Finding the Fourth Proportional to 432.08, 648.16 and 123.93

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Solution

The fourth proportional to 432.08, 648.16 and 123.93 is: 185.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.08 : 648.16 = 123.93 : x
  2. Step 2: Convert to fraction form
    432.08/648.16 = 123.93/x
  3. Step 3: Cross multiply
    432.08x = 648.16 × 123.93
  4. Step 4: Simplify right side
    432.08x = 80,322.61
  5. Step 5: Solve for x
    x = 80,322.61/432.08
  6. Step 6: Final answer
    x = 185.90

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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.