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Finding the Third Proportional to 127,840 and 278,750

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Solution

The third proportional to 127,840 and 278,750 is: 607,803.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,840 : 278,750 = 278,750 : x
  2. Step 2: Convert to fraction form
    127,840/278,750 = 278,750/x
  3. Step 3: Cross multiply
    127,840x = 278,750 × 278,750
  4. Step 4: Simplify right side
    127,840x = 77,701,562,500
  5. Step 5: Solve for x
    x = 77,701,562,500/127,840
  6. Step 6: Final answer
    x = 607,803.21

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.