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Finding the Third Proportional to 101,280 and 221,630

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Solution

The third proportional to 101,280 and 221,630 is: 484,990.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,280 : 221,630 = 221,630 : x
  2. Step 2: Convert to fraction form
    101,280/221,630 = 221,630/x
  3. Step 3: Cross multiply
    101,280x = 221,630 × 221,630
  4. Step 4: Simplify right side
    101,280x = 49,119,856,900
  5. Step 5: Solve for x
    x = 49,119,856,900/101,280
  6. Step 6: Final answer
    x = 484,990.69

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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.