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Finding the Fourth Proportional to 3,754.43, 5,631.21 and 981.38

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Solution

The fourth proportional to 3,754.43, 5,631.21 and 981.38 is: 1,471.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,754.43 : 5,631.21 = 981.38 : x
  2. Step 2: Convert to fraction form
    3,754.43/5,631.21 = 981.38/x
  3. Step 3: Cross multiply
    3,754.43x = 5,631.21 × 981.38
  4. Step 4: Simplify right side
    3,754.43x = 5,526,328.71
  5. Step 5: Solve for x
    x = 5,526,328.71/3,754.43
  6. Step 6: Final answer
    x = 1,471.95

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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.