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Finding the Fourth Proportional to 251.20, 340.20 and 251.20

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Solution

The fourth proportional to 251.20, 340.20 and 251.20 is: 340.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.20 : 340.20 = 251.20 : x
  2. Step 2: Convert to fraction form
    251.20/340.20 = 251.20/x
  3. Step 3: Cross multiply
    251.20x = 340.20 × 251.20
  4. Step 4: Simplify right side
    251.20x = 85,458.24
  5. Step 5: Solve for x
    x = 85,458.24/251.20
  6. Step 6: Final answer
    x = 340.20

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.