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Finding the Fourth Proportional to 242.15, 334.39 and 154.97

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Solution

The fourth proportional to 242.15, 334.39 and 154.97 is: 214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.15 : 334.39 = 154.97 : x
  2. Step 2: Convert to fraction form
    242.15/334.39 = 154.97/x
  3. Step 3: Cross multiply
    242.15x = 334.39 × 154.97
  4. Step 4: Simplify right side
    242.15x = 51,821.78
  5. Step 5: Solve for x
    x = 51,821.78/242.15
  6. Step 6: Final answer
    x = 214.01

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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.