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Finding the Fourth Proportional to 343.30, 516.30 and 308.20

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Solution

The fourth proportional to 343.30, 516.30 and 308.20 is: 463.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.30 : 516.30 = 308.20 : x
  2. Step 2: Convert to fraction form
    343.30/516.30 = 308.20/x
  3. Step 3: Cross multiply
    343.30x = 516.30 × 308.20
  4. Step 4: Simplify right side
    343.30x = 159,123.66
  5. Step 5: Solve for x
    x = 159,123.66/343.30
  6. Step 6: Final answer
    x = 463.51

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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.