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Finding the Fourth Proportional to 1,748.43, 2,620.75 and 871.59

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Solution

The fourth proportional to 1,748.43, 2,620.75 and 871.59 is: 1,306.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,748.43 : 2,620.75 = 871.59 : x
  2. Step 2: Convert to fraction form
    1,748.43/2,620.75 = 871.59/x
  3. Step 3: Cross multiply
    1,748.43x = 2,620.75 × 871.59
  4. Step 4: Simplify right side
    1,748.43x = 2,284,207.49
  5. Step 5: Solve for x
    x = 2,284,207.49/1,748.43
  6. Step 6: Final answer
    x = 1,306.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.