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Finding the Third Proportional to 649.90 and 1,402.31

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Solution

The third proportional to 649.90 and 1,402.31 is: 3,025.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.90 : 1,402.31 = 1,402.31 : x
  2. Step 2: Convert to fraction form
    649.90/1,402.31 = 1,402.31/x
  3. Step 3: Cross multiply
    649.90x = 1,402.31 × 1,402.31
  4. Step 4: Simplify right side
    649.90x = 1,966,480.35
  5. Step 5: Solve for x
    x = 1,966,480.35/649.90
  6. Step 6: Final answer
    x = 3,025.83

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.