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Finding the Fourth Proportional to 1,667.10, 2,500.65 and 743.70

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Solution

The fourth proportional to 1,667.10, 2,500.65 and 743.70 is: 1,115.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,667.10 : 2,500.65 = 743.70 : x
  2. Step 2: Convert to fraction form
    1,667.10/2,500.65 = 743.70/x
  3. Step 3: Cross multiply
    1,667.10x = 2,500.65 × 743.70
  4. Step 4: Simplify right side
    1,667.10x = 1,859,733.41
  5. Step 5: Solve for x
    x = 1,859,733.41/1,667.10
  6. Step 6: Final answer
    x = 1,115.55

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Similar ratio
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1.5x scale

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.