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Finding the Third Proportional to 487.90 and 998.16

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Solution

The third proportional to 487.90 and 998.16 is: 2,042.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.90 : 998.16 = 998.16 : x
  2. Step 2: Convert to fraction form
    487.90/998.16 = 998.16/x
  3. Step 3: Cross multiply
    487.90x = 998.16 × 998.16
  4. Step 4: Simplify right side
    487.90x = 996,315.90
  5. Step 5: Solve for x
    x = 996,315.90/487.90
  6. Step 6: Final answer
    x = 2,042.06

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.