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Finding the Fourth Proportional to 3,754.90, 5,631.86 and 981.76

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Solution

The fourth proportional to 3,754.90, 5,631.86 and 981.76 is: 1,472.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,754.90 : 5,631.86 = 981.76 : x
  2. Step 2: Convert to fraction form
    3,754.90/5,631.86 = 981.76/x
  3. Step 3: Cross multiply
    3,754.90x = 5,631.86 × 981.76
  4. Step 4: Simplify right side
    3,754.90x = 5,529,134.87
  5. Step 5: Solve for x
    x = 5,529,134.87/3,754.90
  6. Step 6: Final answer
    x = 1,472.51

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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.