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Finding the Third Proportional to 1,559 and 3,478

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Solution

The third proportional to 1,559 and 3,478 is: 7,759.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559 : 3,478 = 3,478 : x
  2. Step 2: Convert to fraction form
    1,559/3,478 = 3,478/x
  3. Step 3: Cross multiply
    1,559x = 3,478 × 3,478
  4. Step 4: Simplify right side
    1,559x = 12,096,484
  5. Step 5: Solve for x
    x = 12,096,484/1,559
  6. Step 6: Final answer
    x = 7,759.13

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.