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Finding the Fourth Proportional to 658.36, 986.24 and 397.56

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Solution

The fourth proportional to 658.36, 986.24 and 397.56 is: 595.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.36 : 986.24 = 397.56 : x
  2. Step 2: Convert to fraction form
    658.36/986.24 = 397.56/x
  3. Step 3: Cross multiply
    658.36x = 986.24 × 397.56
  4. Step 4: Simplify right side
    658.36x = 392,089.57
  5. Step 5: Solve for x
    x = 392,089.57/658.36
  6. Step 6: Final answer
    x = 595.55

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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.