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Finding the Third Proportional to 4,121 and 5,605

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Solution

The third proportional to 4,121 and 5,605 is: 7,623.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,121 : 5,605 = 5,605 : x
  2. Step 2: Convert to fraction form
    4,121/5,605 = 5,605/x
  3. Step 3: Cross multiply
    4,121x = 5,605 × 5,605
  4. Step 4: Simplify right side
    4,121x = 31,416,025
  5. Step 5: Solve for x
    x = 31,416,025/4,121
  6. Step 6: Final answer
    x = 7,623.40

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.