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Finding the Third Proportional to 311.25 and 403.88

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Solution

The third proportional to 311.25 and 403.88 is: 524.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.25 : 403.88 = 403.88 : x
  2. Step 2: Convert to fraction form
    311.25/403.88 = 403.88/x
  3. Step 3: Cross multiply
    311.25x = 403.88 × 403.88
  4. Step 4: Simplify right side
    311.25x = 163,115.02
  5. Step 5: Solve for x
    x = 163,115.02/311.25
  6. Step 6: Final answer
    x = 524.06

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.