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Finding the Fourth Proportional to 252.56, 379.14 and 207.20

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Solution

The fourth proportional to 252.56, 379.14 and 207.20 is: 311.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.56 : 379.14 = 207.20 : x
  2. Step 2: Convert to fraction form
    252.56/379.14 = 207.20/x
  3. Step 3: Cross multiply
    252.56x = 379.14 × 207.20
  4. Step 4: Simplify right side
    252.56x = 78,557.81
  5. Step 5: Solve for x
    x = 78,557.81/252.56
  6. Step 6: Final answer
    x = 311.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.