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Finding the Fourth Proportional to 432.51, 648.78 and 158.68

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Solution

The fourth proportional to 432.51, 648.78 and 158.68 is: 238.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.51 : 648.78 = 158.68 : x
  2. Step 2: Convert to fraction form
    432.51/648.78 = 158.68/x
  3. Step 3: Cross multiply
    432.51x = 648.78 × 158.68
  4. Step 4: Simplify right side
    432.51x = 102,948.41
  5. Step 5: Solve for x
    x = 102,948.41/432.51
  6. Step 6: Final answer
    x = 238.03

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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.