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Finding the Fourth Proportional to 2,187.54, 3,281.22 and 726.57

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Solution

The fourth proportional to 2,187.54, 3,281.22 and 726.57 is: 1,089.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.54 : 3,281.22 = 726.57 : x
  2. Step 2: Convert to fraction form
    2,187.54/3,281.22 = 726.57/x
  3. Step 3: Cross multiply
    2,187.54x = 3,281.22 × 726.57
  4. Step 4: Simplify right side
    2,187.54x = 2,384,036.02
  5. Step 5: Solve for x
    x = 2,384,036.02/2,187.54
  6. Step 6: Final answer
    x = 1,089.83

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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.