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Finding the Third Proportional to 266,715 and 412,708.50

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Solution

The third proportional to 266,715 and 412,708.50 is: 638,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,715 : 412,708.50 = 412,708.50 : x
  2. Step 2: Convert to fraction form
    266,715/412,708.50 = 412,708.50/x
  3. Step 3: Cross multiply
    266,715x = 412,708.50 × 412,708.50
  4. Step 4: Simplify right side
    266,715x = 170,328,305,972.25
  5. Step 5: Solve for x
    x = 170,328,305,972.25/266,715
  6. Step 6: Final answer
    x = 638,615.40

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.