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Finding the Third Proportional to 720.56 and 1,237.78

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Solution

The third proportional to 720.56 and 1,237.78 is: 2,126.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.56 : 1,237.78 = 1,237.78 : x
  2. Step 2: Convert to fraction form
    720.56/1,237.78 = 1,237.78/x
  3. Step 3: Cross multiply
    720.56x = 1,237.78 × 1,237.78
  4. Step 4: Simplify right side
    720.56x = 1,532,102.42
  5. Step 5: Solve for x
    x = 1,532,102.42/720.56
  6. Step 6: Final answer
    x = 2,126.26

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.