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Finding the Fourth Proportional to 658.32, 986.58 and 513.36

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Solution

The fourth proportional to 658.32, 986.58 and 513.36 is: 769.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.32 : 986.58 = 513.36 : x
  2. Step 2: Convert to fraction form
    658.32/986.58 = 513.36/x
  3. Step 3: Cross multiply
    658.32x = 986.58 × 513.36
  4. Step 4: Simplify right side
    658.32x = 506,470.71
  5. Step 5: Solve for x
    x = 506,470.71/658.32
  6. Step 6: Final answer
    x = 769.34

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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.