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Finding the Fourth Proportional to 242.91, 335.20 and 154.37

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Solution

The fourth proportional to 242.91, 335.20 and 154.37 is: 213.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.91 : 335.20 = 154.37 : x
  2. Step 2: Convert to fraction form
    242.91/335.20 = 154.37/x
  3. Step 3: Cross multiply
    242.91x = 335.20 × 154.37
  4. Step 4: Simplify right side
    242.91x = 51,744.82
  5. Step 5: Solve for x
    x = 51,744.82/242.91
  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.