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Finding the Fourth Proportional to 658.32, 986.58 and 474.90

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Solution

The fourth proportional to 658.32, 986.58 and 474.90 is: 711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.32 : 986.58 = 474.90 : x
  2. Step 2: Convert to fraction form
    658.32/986.58 = 474.90/x
  3. Step 3: Cross multiply
    658.32x = 986.58 × 474.90
  4. Step 4: Simplify right side
    658.32x = 468,526.84
  5. Step 5: Solve for x
    x = 468,526.84/658.32
  6. Step 6: Final answer
    x = 711.70

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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.