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Finding the Fourth Proportional to 3,251.90, 4,877.85 and 786.71

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Solution

The fourth proportional to 3,251.90, 4,877.85 and 786.71 is: 1,180.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,251.90 : 4,877.85 = 786.71 : x
  2. Step 2: Convert to fraction form
    3,251.90/4,877.85 = 786.71/x
  3. Step 3: Cross multiply
    3,251.90x = 4,877.85 × 786.71
  4. Step 4: Simplify right side
    3,251.90x = 3,837,427.02
  5. Step 5: Solve for x
    x = 3,837,427.02/3,251.90
  6. Step 6: Final answer
    x = 1,180.06

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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.