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Finding the Fourth Proportional to 242.34, 334.40 and 142.76

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Solution

The fourth proportional to 242.34, 334.40 and 142.76 is: 197.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.34 : 334.40 = 142.76 : x
  2. Step 2: Convert to fraction form
    242.34/334.40 = 142.76/x
  3. Step 3: Cross multiply
    242.34x = 334.40 × 142.76
  4. Step 4: Simplify right side
    242.34x = 47,740.27
  5. Step 5: Solve for x
    x = 47,740.27/242.34
  6. Step 6: Final answer
    x = 197.00

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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.