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Finding the Fourth Proportional to 516.24, 712.68 and 397.95

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Solution

The fourth proportional to 516.24, 712.68 and 397.95 is: 549.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.24 : 712.68 = 397.95 : x
  2. Step 2: Convert to fraction form
    516.24/712.68 = 397.95/x
  3. Step 3: Cross multiply
    516.24x = 712.68 × 397.95
  4. Step 4: Simplify right side
    516.24x = 283,612.79
  5. Step 5: Solve for x
    x = 283,612.79/516.24
  6. Step 6: Final answer
    x = 549.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.