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Finding the Fourth Proportional to 1,711.75, 2,567.37 and 479

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Solution

The fourth proportional to 1,711.75, 2,567.37 and 479 is: 718.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.75 : 2,567.37 = 479 : x
  2. Step 2: Convert to fraction form
    1,711.75/2,567.37 = 479/x
  3. Step 3: Cross multiply
    1,711.75x = 2,567.37 × 479
  4. Step 4: Simplify right side
    1,711.75x = 1,229,769.03
  5. Step 5: Solve for x
    x = 1,229,769.03/1,711.75
  6. Step 6: Final answer
    x = 718.43

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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.