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Finding the Fourth Proportional to 3,900.61, 5,850.92 and 1,127.68

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Solution

The fourth proportional to 3,900.61, 5,850.92 and 1,127.68 is: 1,691.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.61 : 5,850.92 = 1,127.68 : x
  2. Step 2: Convert to fraction form
    3,900.61/5,850.92 = 1,127.68/x
  3. Step 3: Cross multiply
    3,900.61x = 5,850.92 × 1,127.68
  4. Step 4: Simplify right side
    3,900.61x = 6,597,965.47
  5. Step 5: Solve for x
    x = 6,597,965.47/3,900.61
  6. Step 6: Final answer
    x = 1,691.52

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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.