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Finding the Fourth Proportional to 253,690.80, 380,505.96 and 66,716.88

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Solution

The fourth proportional to 253,690.80, 380,505.96 and 66,716.88 is: 100,067.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,690.80 : 380,505.96 = 66,716.88 : x
  2. Step 2: Convert to fraction form
    253,690.80/380,505.96 = 66,716.88/x
  3. Step 3: Cross multiply
    253,690.80x = 380,505.96 × 66,716.88
  4. Step 4: Simplify right side
    253,690.80x = 25,386,170,472.60
  5. Step 5: Solve for x
    x = 25,386,170,472.60/253,690.80
  6. Step 6: Final answer
    x = 100,067.37

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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.