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Finding the Fourth Proportional to 432.16, 648.24 and 154.52

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Solution

The fourth proportional to 432.16, 648.24 and 154.52 is: 231.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.16 : 648.24 = 154.52 : x
  2. Step 2: Convert to fraction form
    432.16/648.24 = 154.52/x
  3. Step 3: Cross multiply
    432.16x = 648.24 × 154.52
  4. Step 4: Simplify right side
    432.16x = 100,166.04
  5. Step 5: Solve for x
    x = 100,166.04/432.16
  6. Step 6: Final answer
    x = 231.78

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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.