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Finding the Fourth Proportional to 2,643.18, 3,964.77 and 794.28

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Solution

The fourth proportional to 2,643.18, 3,964.77 and 794.28 is: 1,191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.18 : 3,964.77 = 794.28 : x
  2. Step 2: Convert to fraction form
    2,643.18/3,964.77 = 794.28/x
  3. Step 3: Cross multiply
    2,643.18x = 3,964.77 × 794.28
  4. Step 4: Simplify right side
    2,643.18x = 3,149,152.38
  5. Step 5: Solve for x
    x = 3,149,152.38/2,643.18
  6. Step 6: Final answer
    x = 1,191.43

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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.