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Finding the Fourth Proportional to 242.92, 335.20 and 144.72

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Solution

The fourth proportional to 242.92, 335.20 and 144.72 is: 199.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.92 : 335.20 = 144.72 : x
  2. Step 2: Convert to fraction form
    242.92/335.20 = 144.72/x
  3. Step 3: Cross multiply
    242.92x = 335.20 × 144.72
  4. Step 4: Simplify right side
    242.92x = 48,510.14
  5. Step 5: Solve for x
    x = 48,510.14/242.92
  6. Step 6: Final answer
    x = 199.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.