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Finding the Third Proportional to 427,279.50 and 661,390.50

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Solution

The third proportional to 427,279.50 and 661,390.50 is: 1,023,773.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,279.50 : 661,390.50 = 661,390.50 : x
  2. Step 2: Convert to fraction form
    427,279.50/661,390.50 = 661,390.50/x
  3. Step 3: Cross multiply
    427,279.50x = 661,390.50 × 661,390.50
  4. Step 4: Simplify right side
    427,279.50x = 437,437,393,490.25
  5. Step 5: Solve for x
    x = 437,437,393,490.25/427,279.50
  6. Step 6: Final answer
    x = 1,023,773.42

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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.