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Finding the Fourth Proportional to 2,641.11, 3,962.62 and 1,236.76

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Solution

The fourth proportional to 2,641.11, 3,962.62 and 1,236.76 is: 1,855.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.11 : 3,962.62 = 1,236.76 : x
  2. Step 2: Convert to fraction form
    2,641.11/3,962.62 = 1,236.76/x
  3. Step 3: Cross multiply
    2,641.11x = 3,962.62 × 1,236.76
  4. Step 4: Simplify right side
    2,641.11x = 4,900,809.91
  5. Step 5: Solve for x
    x = 4,900,809.91/2,641.11
  6. Step 6: Final answer
    x = 1,855.59

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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.