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Finding the Third Proportional to 278,690.63 and 610,780.50

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Solution

The third proportional to 278,690.63 and 610,780.50 is: 1,338,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,690.63 : 610,780.50 = 610,780.50 : x
  2. Step 2: Convert to fraction form
    278,690.63/610,780.50 = 610,780.50/x
  3. Step 3: Cross multiply
    278,690.63x = 610,780.50 × 610,780.50
  4. Step 4: Simplify right side
    278,690.63x = 373,052,819,180.25
  5. Step 5: Solve for x
    x = 373,052,819,180.25/278,690.63
  6. Step 6: Final answer
    x = 1,338,591.20

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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.