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Finding the Fourth Proportional to 296.92, 445.22 and 142.64

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Solution

The fourth proportional to 296.92, 445.22 and 142.64 is: 213.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.92 : 445.22 = 142.64 : x
  2. Step 2: Convert to fraction form
    296.92/445.22 = 142.64/x
  3. Step 3: Cross multiply
    296.92x = 445.22 × 142.64
  4. Step 4: Simplify right side
    296.92x = 63,506.18
  5. Step 5: Solve for x
    x = 63,506.18/296.92
  6. Step 6: Final answer
    x = 213.88

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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.