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Finding the Fourth Proportional to 242.49, 334.57 and 142.89

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Solution

The fourth proportional to 242.49, 334.57 and 142.89 is: 197.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.49 : 334.57 = 142.89 : x
  2. Step 2: Convert to fraction form
    242.49/334.57 = 142.89/x
  3. Step 3: Cross multiply
    242.49x = 334.57 × 142.89
  4. Step 4: Simplify right side
    242.49x = 47,806.71
  5. Step 5: Solve for x
    x = 47,806.71/242.49
  6. Step 6: Final answer
    x = 197.15

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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.