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Finding the Fourth Proportional to 432.68, 648.78 and 189.10

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Solution

The fourth proportional to 432.68, 648.78 and 189.10 is: 283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.68 : 648.78 = 189.10 : x
  2. Step 2: Convert to fraction form
    432.68/648.78 = 189.10/x
  3. Step 3: Cross multiply
    432.68x = 648.78 × 189.10
  4. Step 4: Simplify right side
    432.68x = 122,684.30
  5. Step 5: Solve for x
    x = 122,684.30/432.68
  6. Step 6: Final answer
    x = 283.55

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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.