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Finding the Third Proportional to 859.99 and 1,338.40

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Solution

The third proportional to 859.99 and 1,338.40 is: 2,082.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.99 : 1,338.40 = 1,338.40 : x
  2. Step 2: Convert to fraction form
    859.99/1,338.40 = 1,338.40/x
  3. Step 3: Cross multiply
    859.99x = 1,338.40 × 1,338.40
  4. Step 4: Simplify right side
    859.99x = 1,791,310.38
  5. Step 5: Solve for x
    x = 1,791,310.38/859.99
  6. Step 6: Final answer
    x = 2,082.94

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.