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Finding the Fourth Proportional to 346.80, 517.26 and 338.61

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Solution

The fourth proportional to 346.80, 517.26 and 338.61 is: 505.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.80 : 517.26 = 338.61 : x
  2. Step 2: Convert to fraction form
    346.80/517.26 = 338.61/x
  3. Step 3: Cross multiply
    346.80x = 517.26 × 338.61
  4. Step 4: Simplify right side
    346.80x = 175,149.41
  5. Step 5: Solve for x
    x = 175,149.41/346.80
  6. Step 6: Final answer
    x = 505.04

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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.