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Finding the Fourth Proportional to 432.72, 649.42 and 159

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Solution

The fourth proportional to 432.72, 649.42 and 159 is: 238.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.72 : 649.42 = 159 : x
  2. Step 2: Convert to fraction form
    432.72/649.42 = 159/x
  3. Step 3: Cross multiply
    432.72x = 649.42 × 159
  4. Step 4: Simplify right side
    432.72x = 103,257.78
  5. Step 5: Solve for x
    x = 103,257.78/432.72
  6. Step 6: Final answer
    x = 238.62

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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.