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Finding the Third Proportional to 243.56 and 657.84

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Solution

The third proportional to 243.56 and 657.84 is: 1,776.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.56 : 657.84 = 657.84 : x
  2. Step 2: Convert to fraction form
    243.56/657.84 = 657.84/x
  3. Step 3: Cross multiply
    243.56x = 657.84 × 657.84
  4. Step 4: Simplify right side
    243.56x = 432,758.40
  5. Step 5: Solve for x
    x = 432,758.40/243.56
  6. Step 6: Final answer
    x = 1,776.79

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.