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Finding the Fourth Proportional to 3,179.66, 4,388.22 and 1,921.34

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Solution

The fourth proportional to 3,179.66, 4,388.22 and 1,921.34 is: 2,651.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.66 : 4,388.22 = 1,921.34 : x
  2. Step 2: Convert to fraction form
    3,179.66/4,388.22 = 1,921.34/x
  3. Step 3: Cross multiply
    3,179.66x = 4,388.22 × 1,921.34
  4. Step 4: Simplify right side
    3,179.66x = 8,431,262.61
  5. Step 5: Solve for x
    x = 8,431,262.61/3,179.66
  6. Step 6: Final answer
    x = 2,651.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.