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Finding the Fourth Proportional to 3,930.88, 5,899.20 and 3,170.56

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Solution

The fourth proportional to 3,930.88, 5,899.20 and 3,170.56 is: 4,758.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.88 : 5,899.20 = 3,170.56 : x
  2. Step 2: Convert to fraction form
    3,930.88/5,899.20 = 3,170.56/x
  3. Step 3: Cross multiply
    3,930.88x = 5,899.20 × 3,170.56
  4. Step 4: Simplify right side
    3,930.88x = 18,703,767.55
  5. Step 5: Solve for x
    x = 18,703,767.55/3,930.88
  6. Step 6: Final answer
    x = 4,758.16

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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.