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Finding the Third Proportional to 1,258 and 1,661

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Solution

The third proportional to 1,258 and 1,661 is: 2,193.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258 : 1,661 = 1,661 : x
  2. Step 2: Convert to fraction form
    1,258/1,661 = 1,661/x
  3. Step 3: Cross multiply
    1,258x = 1,661 × 1,661
  4. Step 4: Simplify right side
    1,258x = 2,758,921
  5. Step 5: Solve for x
    x = 2,758,921/1,258
  6. Step 6: Final answer
    x = 2,193.10

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.