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Finding the Fourth Proportional to 2,643.13, 3,964.54 and 794.20

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Solution

The fourth proportional to 2,643.13, 3,964.54 and 794.20 is: 1,191.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.13 : 3,964.54 = 794.20 : x
  2. Step 2: Convert to fraction form
    2,643.13/3,964.54 = 794.20/x
  3. Step 3: Cross multiply
    2,643.13x = 3,964.54 × 794.20
  4. Step 4: Simplify right side
    2,643.13x = 3,148,633.70
  5. Step 5: Solve for x
    x = 3,148,633.70/2,643.13
  6. Step 6: Final answer
    x = 1,191.25

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1.5x scale

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.