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Finding the Fourth Proportional to 2,643.11, 3,964.86 and 794.37

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Solution

The fourth proportional to 2,643.11, 3,964.86 and 794.37 is: 1,191.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.11 : 3,964.86 = 794.37 : x
  2. Step 2: Convert to fraction form
    2,643.11/3,964.86 = 794.37/x
  3. Step 3: Cross multiply
    2,643.11x = 3,964.86 × 794.37
  4. Step 4: Simplify right side
    2,643.11x = 3,149,547.99
  5. Step 5: Solve for x
    x = 3,149,547.99/2,643.11
  6. Step 6: Final answer
    x = 1,191.61

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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.