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Finding the Fourth Proportional to 4,781.60, 7,177.80 and 3,690.80

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Solution

The fourth proportional to 4,781.60, 7,177.80 and 3,690.80 is: 5,540.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,781.60 : 7,177.80 = 3,690.80 : x
  2. Step 2: Convert to fraction form
    4,781.60/7,177.80 = 3,690.80/x
  3. Step 3: Cross multiply
    4,781.60x = 7,177.80 × 3,690.80
  4. Step 4: Simplify right side
    4,781.60x = 26,491,824.24
  5. Step 5: Solve for x
    x = 26,491,824.24/4,781.60
  6. Step 6: Final answer
    x = 5,540.37

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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.