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Finding the Third Proportional to 312.29 and 632.18

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Solution

The third proportional to 312.29 and 632.18 is: 1,279.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.29 : 632.18 = 632.18 : x
  2. Step 2: Convert to fraction form
    312.29/632.18 = 632.18/x
  3. Step 3: Cross multiply
    312.29x = 632.18 × 632.18
  4. Step 4: Simplify right side
    312.29x = 399,651.16
  5. Step 5: Solve for x
    x = 399,651.16/312.29
  6. Step 6: Final answer
    x = 1,279.73

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.