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Finding the Fourth Proportional to 658.16, 986.54 and 219.29

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Solution

The fourth proportional to 658.16, 986.54 and 219.29 is: 328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.16 : 986.54 = 219.29 : x
  2. Step 2: Convert to fraction form
    658.16/986.54 = 219.29/x
  3. Step 3: Cross multiply
    658.16x = 986.54 × 219.29
  4. Step 4: Simplify right side
    658.16x = 216,337.81
  5. Step 5: Solve for x
    x = 216,337.81/658.16
  6. Step 6: Final answer
    x = 328.70

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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.