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Finding the Third Proportional to 120,396 and 260,880

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Solution

The third proportional to 120,396 and 260,880 is: 565,287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,396 : 260,880 = 260,880 : x
  2. Step 2: Convert to fraction form
    120,396/260,880 = 260,880/x
  3. Step 3: Cross multiply
    120,396x = 260,880 × 260,880
  4. Step 4: Simplify right side
    120,396x = 68,058,374,400
  5. Step 5: Solve for x
    x = 68,058,374,400/120,396
  6. Step 6: Final answer
    x = 565,287.67

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.