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Finding the Fourth Proportional to 3,491.78, 5,236.88 and 1,026.80

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Solution

The fourth proportional to 3,491.78, 5,236.88 and 1,026.80 is: 1,539.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.78 : 5,236.88 = 1,026.80 : x
  2. Step 2: Convert to fraction form
    3,491.78/5,236.88 = 1,026.80/x
  3. Step 3: Cross multiply
    3,491.78x = 5,236.88 × 1,026.80
  4. Step 4: Simplify right side
    3,491.78x = 5,377,228.38
  5. Step 5: Solve for x
    x = 5,377,228.38/3,491.78
  6. Step 6: Final answer
    x = 1,539.97

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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.