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Finding the Fourth Proportional to 252.42, 348.30 and 154.20

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Solution

The fourth proportional to 252.42, 348.30 and 154.20 is: 212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.42 : 348.30 = 154.20 : x
  2. Step 2: Convert to fraction form
    252.42/348.30 = 154.20/x
  3. Step 3: Cross multiply
    252.42x = 348.30 × 154.20
  4. Step 4: Simplify right side
    252.42x = 53,709.17
  5. Step 5: Solve for x
    x = 53,709.17/252.42
  6. Step 6: Final answer
    x = 212.78

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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.