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Finding the Third Proportional to 1,585.50 and 3,489

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Solution

The third proportional to 1,585.50 and 3,489 is: 7,677.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.50 : 3,489 = 3,489 : x
  2. Step 2: Convert to fraction form
    1,585.50/3,489 = 3,489/x
  3. Step 3: Cross multiply
    1,585.50x = 3,489 × 3,489
  4. Step 4: Simplify right side
    1,585.50x = 12,173,121
  5. Step 5: Solve for x
    x = 12,173,121/1,585.50
  6. Step 6: Final answer
    x = 7,677.78

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.