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Finding the Third Proportional to 1,089.25 and 1,659.63

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Solution

The third proportional to 1,089.25 and 1,659.63 is: 2,528.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.25 : 1,659.63 = 1,659.63 : x
  2. Step 2: Convert to fraction form
    1,089.25/1,659.63 = 1,659.63/x
  3. Step 3: Cross multiply
    1,089.25x = 1,659.63 × 1,659.63
  4. Step 4: Simplify right side
    1,089.25x = 2,754,355.14
  5. Step 5: Solve for x
    x = 2,754,355.14/1,089.25
  6. Step 6: Final answer
    x = 2,528.67

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.