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Finding the Third Proportional to 120,645 and 263,640

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Solution

The third proportional to 120,645 and 263,640 is: 576,120.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,645 : 263,640 = 263,640 : x
  2. Step 2: Convert to fraction form
    120,645/263,640 = 263,640/x
  3. Step 3: Cross multiply
    120,645x = 263,640 × 263,640
  4. Step 4: Simplify right side
    120,645x = 69,506,049,600
  5. Step 5: Solve for x
    x = 69,506,049,600/120,645
  6. Step 6: Final answer
    x = 576,120.43

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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.