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Finding the Third Proportional to 675.42 and 726.05

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Solution

The third proportional to 675.42 and 726.05 is: 780.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.42 : 726.05 = 726.05 : x
  2. Step 2: Convert to fraction form
    675.42/726.05 = 726.05/x
  3. Step 3: Cross multiply
    675.42x = 726.05 × 726.05
  4. Step 4: Simplify right side
    675.42x = 527,144.06
  5. Step 5: Solve for x
    x = 527,144.06/675.42
  6. Step 6: Final answer
    x = 780.47

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.