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Finding the Fourth Proportional to 5,144.60, 7,716.89 and 1,447.20

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Solution

The fourth proportional to 5,144.60, 7,716.89 and 1,447.20 is: 2,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,144.60 : 7,716.89 = 1,447.20 : x
  2. Step 2: Convert to fraction form
    5,144.60/7,716.89 = 1,447.20/x
  3. Step 3: Cross multiply
    5,144.60x = 7,716.89 × 1,447.20
  4. Step 4: Simplify right side
    5,144.60x = 11,167,886.83
  5. Step 5: Solve for x
    x = 11,167,886.83/5,144.60
  6. Step 6: Final answer
    x = 2,170.80

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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.