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Finding the Third Proportional to 311.81 and 532.13

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Solution

The third proportional to 311.81 and 532.13 is: 908.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.81 : 532.13 = 532.13 : x
  2. Step 2: Convert to fraction form
    311.81/532.13 = 532.13/x
  3. Step 3: Cross multiply
    311.81x = 532.13 × 532.13
  4. Step 4: Simplify right side
    311.81x = 283,157.02
  5. Step 5: Solve for x
    x = 283,157.02/311.81
  6. Step 6: Final answer
    x = 908.10

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.