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Finding the Fourth Proportional to 658.79, 985.28 and 586.18

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Solution

The fourth proportional to 658.79, 985.28 and 586.18 is: 876.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.79 : 985.28 = 586.18 : x
  2. Step 2: Convert to fraction form
    658.79/985.28 = 586.18/x
  3. Step 3: Cross multiply
    658.79x = 985.28 × 586.18
  4. Step 4: Simplify right side
    658.79x = 577,546.04
  5. Step 5: Solve for x
    x = 577,546.04/658.79
  6. Step 6: Final answer
    x = 876.68

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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.