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Finding the Fourth Proportional to 3,877.28, 5,815.94 and 1,245.18

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Solution

The fourth proportional to 3,877.28, 5,815.94 and 1,245.18 is: 1,867.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.28 : 5,815.94 = 1,245.18 : x
  2. Step 2: Convert to fraction form
    3,877.28/5,815.94 = 1,245.18/x
  3. Step 3: Cross multiply
    3,877.28x = 5,815.94 × 1,245.18
  4. Step 4: Simplify right side
    3,877.28x = 7,241,907.75
  5. Step 5: Solve for x
    x = 7,241,907.75/3,877.28
  6. Step 6: Final answer
    x = 1,867.78

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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.