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Finding the Third Proportional to 231.13 and 490.63

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Solution

The third proportional to 231.13 and 490.63 is: 1,041.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.13 : 490.63 = 490.63 : x
  2. Step 2: Convert to fraction form
    231.13/490.63 = 490.63/x
  3. Step 3: Cross multiply
    231.13x = 490.63 × 490.63
  4. Step 4: Simplify right side
    231.13x = 240,712.89
  5. Step 5: Solve for x
    x = 240,712.89/231.13
  6. Step 6: Final answer
    x = 1,041.48

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.