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Finding the Fourth Proportional to 2,541.23, 3,811.85 and 809.86

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Solution

The fourth proportional to 2,541.23, 3,811.85 and 809.86 is: 1,214.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,541.23 : 3,811.85 = 809.86 : x
  2. Step 2: Convert to fraction form
    2,541.23/3,811.85 = 809.86/x
  3. Step 3: Cross multiply
    2,541.23x = 3,811.85 × 809.86
  4. Step 4: Simplify right side
    2,541.23x = 3,087,064.84
  5. Step 5: Solve for x
    x = 3,087,064.84/2,541.23
  6. Step 6: Final answer
    x = 1,214.79

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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.