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Finding the Third Proportional to 278,919.75 and 609,679.50

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Solution

The third proportional to 278,919.75 and 609,679.50 is: 1,332,673.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,919.75 : 609,679.50 = 609,679.50 : x
  2. Step 2: Convert to fraction form
    278,919.75/609,679.50 = 609,679.50/x
  3. Step 3: Cross multiply
    278,919.75x = 609,679.50 × 609,679.50
  4. Step 4: Simplify right side
    278,919.75x = 371,709,092,720.25
  5. Step 5: Solve for x
    x = 371,709,092,720.25/278,919.75
  6. Step 6: Final answer
    x = 1,332,673.98

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.