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Finding the Fourth Proportional to 1,667.88, 2,500.65 and 742.92

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Solution

The fourth proportional to 1,667.88, 2,500.65 and 742.92 is: 1,113.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,667.88 : 2,500.65 = 742.92 : x
  2. Step 2: Convert to fraction form
    1,667.88/2,500.65 = 742.92/x
  3. Step 3: Cross multiply
    1,667.88x = 2,500.65 × 742.92
  4. Step 4: Simplify right side
    1,667.88x = 1,857,782.90
  5. Step 5: Solve for x
    x = 1,857,782.90/1,667.88
  6. Step 6: Final answer
    x = 1,113.86

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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.