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Finding the Fourth Proportional to 3,981.63, 5,490.22 and 2,722.89

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Solution

The fourth proportional to 3,981.63, 5,490.22 and 2,722.89 is: 3,754.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.63 : 5,490.22 = 2,722.89 : x
  2. Step 2: Convert to fraction form
    3,981.63/5,490.22 = 2,722.89/x
  3. Step 3: Cross multiply
    3,981.63x = 5,490.22 × 2,722.89
  4. Step 4: Simplify right side
    3,981.63x = 14,949,265.14
  5. Step 5: Solve for x
    x = 14,949,265.14/3,981.63
  6. Step 6: Final answer
    x = 3,754.56

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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.