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Finding the Fourth Proportional to 242.91, 335.10 and 143.28

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Solution

The fourth proportional to 242.91, 335.10 and 143.28 is: 197.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.91 : 335.10 = 143.28 : x
  2. Step 2: Convert to fraction form
    242.91/335.10 = 143.28/x
  3. Step 3: Cross multiply
    242.91x = 335.10 × 143.28
  4. Step 4: Simplify right side
    242.91x = 48,013.13
  5. Step 5: Solve for x
    x = 48,013.13/242.91
  6. Step 6: Final answer
    x = 197.66

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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.