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Finding the Third Proportional to 121,800 and 265,680

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Solution

The third proportional to 121,800 and 265,680 is: 579,522.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,800 : 265,680 = 265,680 : x
  2. Step 2: Convert to fraction form
    121,800/265,680 = 265,680/x
  3. Step 3: Cross multiply
    121,800x = 265,680 × 265,680
  4. Step 4: Simplify right side
    121,800x = 70,585,862,400
  5. Step 5: Solve for x
    x = 70,585,862,400/121,800
  6. Step 6: Final answer
    x = 579,522.68

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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.