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Finding the Fourth Proportional to 349.60, 520.61 and 343.52

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Solution

The fourth proportional to 349.60, 520.61 and 343.52 is: 511.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.60 : 520.61 = 343.52 : x
  2. Step 2: Convert to fraction form
    349.60/520.61 = 343.52/x
  3. Step 3: Cross multiply
    349.60x = 520.61 × 343.52
  4. Step 4: Simplify right side
    349.60x = 178,839.95
  5. Step 5: Solve for x
    x = 178,839.95/349.60
  6. Step 6: Final answer
    x = 511.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.