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Finding the Fourth Proportional to 1,039.32, 1,558.97 and 269.82

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Solution

The fourth proportional to 1,039.32, 1,558.97 and 269.82 is: 404.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.32 : 1,558.97 = 269.82 : x
  2. Step 2: Convert to fraction form
    1,039.32/1,558.97 = 269.82/x
  3. Step 3: Cross multiply
    1,039.32x = 1,558.97 × 269.82
  4. Step 4: Simplify right side
    1,039.32x = 420,639.94
  5. Step 5: Solve for x
    x = 420,639.94/1,039.32
  6. Step 6: Final answer
    x = 404.73

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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.