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Finding the Third Proportional to 278,763 and 420,754.50

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Solution

The third proportional to 278,763 and 420,754.50 is: 635,071.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,763 : 420,754.50 = 420,754.50 : x
  2. Step 2: Convert to fraction form
    278,763/420,754.50 = 420,754.50/x
  3. Step 3: Cross multiply
    278,763x = 420,754.50 × 420,754.50
  4. Step 4: Simplify right side
    278,763x = 177,034,349,270.25
  5. Step 5: Solve for x
    x = 177,034,349,270.25/278,763
  6. Step 6: Final answer
    x = 635,071.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.