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Finding the Fourth Proportional to 653.20, 979.46 and 220.04

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Solution

The fourth proportional to 653.20, 979.46 and 220.04 is: 329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.20 : 979.46 = 220.04 : x
  2. Step 2: Convert to fraction form
    653.20/979.46 = 220.04/x
  3. Step 3: Cross multiply
    653.20x = 979.46 × 220.04
  4. Step 4: Simplify right side
    653.20x = 215,520.38
  5. Step 5: Solve for x
    x = 215,520.38/653.20
  6. Step 6: Final answer
    x = 329.95

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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.