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Finding the Fourth Proportional to 1,249.81, 1,723.84 and 876.87

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Solution

The fourth proportional to 1,249.81, 1,723.84 and 876.87 is: 1,209.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.81 : 1,723.84 = 876.87 : x
  2. Step 2: Convert to fraction form
    1,249.81/1,723.84 = 876.87/x
  3. Step 3: Cross multiply
    1,249.81x = 1,723.84 × 876.87
  4. Step 4: Simplify right side
    1,249.81x = 1,511,583.58
  5. Step 5: Solve for x
    x = 1,511,583.58/1,249.81
  6. Step 6: Final answer
    x = 1,209.45

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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.