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Finding the Fourth Proportional to 251.20, 346.48 and 147.72

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Solution

The fourth proportional to 251.20, 346.48 and 147.72 is: 203.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.20 : 346.48 = 147.72 : x
  2. Step 2: Convert to fraction form
    251.20/346.48 = 147.72/x
  3. Step 3: Cross multiply
    251.20x = 346.48 × 147.72
  4. Step 4: Simplify right side
    251.20x = 51,182.03
  5. Step 5: Solve for x
    x = 51,182.03/251.20
  6. Step 6: Final answer
    x = 203.75

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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.