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Finding the Fourth Proportional to 1,231.81, 1,847.72 and 451.88

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Solution

The fourth proportional to 1,231.81, 1,847.72 and 451.88 is: 677.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.81 : 1,847.72 = 451.88 : x
  2. Step 2: Convert to fraction form
    1,231.81/1,847.72 = 451.88/x
  3. Step 3: Cross multiply
    1,231.81x = 1,847.72 × 451.88
  4. Step 4: Simplify right side
    1,231.81x = 834,947.71
  5. Step 5: Solve for x
    x = 834,947.71/1,231.81
  6. Step 6: Final answer
    x = 677.82

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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.