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Finding the Fourth Proportional to 2,191.87, 3,287.77 and 548.41

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Solution

The fourth proportional to 2,191.87, 3,287.77 and 548.41 is: 822.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.87 : 3,287.77 = 548.41 : x
  2. Step 2: Convert to fraction form
    2,191.87/3,287.77 = 548.41/x
  3. Step 3: Cross multiply
    2,191.87x = 3,287.77 × 548.41
  4. Step 4: Simplify right side
    2,191.87x = 1,803,045.95
  5. Step 5: Solve for x
    x = 1,803,045.95/2,191.87
  6. Step 6: Final answer
    x = 822.61

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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.