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Finding the Fourth Proportional to 242.18, 334.05 and 143.90

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Solution

The fourth proportional to 242.18, 334.05 and 143.90 is: 198.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.18 : 334.05 = 143.90 : x
  2. Step 2: Convert to fraction form
    242.18/334.05 = 143.90/x
  3. Step 3: Cross multiply
    242.18x = 334.05 × 143.90
  4. Step 4: Simplify right side
    242.18x = 48,069.80
  5. Step 5: Solve for x
    x = 48,069.80/242.18
  6. Step 6: Final answer
    x = 198.49

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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.