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Finding the Third Proportional to 637.31 and 1,390.13

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Solution

The third proportional to 637.31 and 1,390.13 is: 3,032.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.31 : 1,390.13 = 1,390.13 : x
  2. Step 2: Convert to fraction form
    637.31/1,390.13 = 1,390.13/x
  3. Step 3: Cross multiply
    637.31x = 1,390.13 × 1,390.13
  4. Step 4: Simplify right side
    637.31x = 1,932,447.52
  5. Step 5: Solve for x
    x = 1,932,447.52/637.31
  6. Step 6: Final answer
    x = 3,032.18

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.