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Finding the Fourth Proportional to 432.80, 649.60 and 341.76

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Solution

The fourth proportional to 432.80, 649.60 and 341.76 is: 512.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.80 : 649.60 = 341.76 : x
  2. Step 2: Convert to fraction form
    432.80/649.60 = 341.76/x
  3. Step 3: Cross multiply
    432.80x = 649.60 × 341.76
  4. Step 4: Simplify right side
    432.80x = 222,007.30
  5. Step 5: Solve for x
    x = 222,007.30/432.80
  6. Step 6: Final answer
    x = 512.96

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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.