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Finding the Fourth Proportional to 658.81, 908.12 and 518.71

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Solution

The fourth proportional to 658.81, 908.12 and 518.71 is: 715.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.81 : 908.12 = 518.71 : x
  2. Step 2: Convert to fraction form
    658.81/908.12 = 518.71/x
  3. Step 3: Cross multiply
    658.81x = 908.12 × 518.71
  4. Step 4: Simplify right side
    658.81x = 471,049.74
  5. Step 5: Solve for x
    x = 471,049.74/658.81
  6. Step 6: Final answer
    x = 715.00

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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.