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Finding the Fourth Proportional to 242.89, 335.13 and 154.39

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Solution

The fourth proportional to 242.89, 335.13 and 154.39 is: 213.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.89 : 335.13 = 154.39 : x
  2. Step 2: Convert to fraction form
    242.89/335.13 = 154.39/x
  3. Step 3: Cross multiply
    242.89x = 335.13 × 154.39
  4. Step 4: Simplify right side
    242.89x = 51,740.72
  5. Step 5: Solve for x
    x = 51,740.72/242.89
  6. Step 6: Final answer
    x = 213.02

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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.