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Finding the Fourth Proportional to 432.92, 648.90 and 216.02

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Solution

The fourth proportional to 432.92, 648.90 and 216.02 is: 323.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.92 : 648.90 = 216.02 : x
  2. Step 2: Convert to fraction form
    432.92/648.90 = 216.02/x
  3. Step 3: Cross multiply
    432.92x = 648.90 × 216.02
  4. Step 4: Simplify right side
    432.92x = 140,175.38
  5. Step 5: Solve for x
    x = 140,175.38/432.92
  6. Step 6: Final answer
    x = 323.79

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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.