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Finding the Fourth Proportional to 252.80, 348.90 and 154.60

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Solution

The fourth proportional to 252.80, 348.90 and 154.60 is: 213.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.80 : 348.90 = 154.60 : x
  2. Step 2: Convert to fraction form
    252.80/348.90 = 154.60/x
  3. Step 3: Cross multiply
    252.80x = 348.90 × 154.60
  4. Step 4: Simplify right side
    252.80x = 53,939.94
  5. Step 5: Solve for x
    x = 53,939.94/252.80
  6. Step 6: Final answer
    x = 213.37

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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.