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Finding the Fourth Proportional to 432.68, 648.81 and 158.90

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Solution

The fourth proportional to 432.68, 648.81 and 158.90 is: 238.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.68 : 648.81 = 158.90 : x
  2. Step 2: Convert to fraction form
    432.68/648.81 = 158.90/x
  3. Step 3: Cross multiply
    432.68x = 648.81 × 158.90
  4. Step 4: Simplify right side
    432.68x = 103,092.66
  5. Step 5: Solve for x
    x = 103,092.66/432.68
  6. Step 6: Final answer
    x = 238.27

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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.