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Finding the Third Proportional to 127,768 and 268,780

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Solution

The third proportional to 127,768 and 268,780 is: 565,420.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,768 : 268,780 = 268,780 : x
  2. Step 2: Convert to fraction form
    127,768/268,780 = 268,780/x
  3. Step 3: Cross multiply
    127,768x = 268,780 × 268,780
  4. Step 4: Simplify right side
    127,768x = 72,242,688,400
  5. Step 5: Solve for x
    x = 72,242,688,400/127,768
  6. Step 6: Final answer
    x = 565,420.83

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.