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Finding the Fourth Proportional to 1,965.75, 2,711.12 and 1,179.24

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Solution

The fourth proportional to 1,965.75, 2,711.12 and 1,179.24 is: 1,626.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.75 : 2,711.12 = 1,179.24 : x
  2. Step 2: Convert to fraction form
    1,965.75/2,711.12 = 1,179.24/x
  3. Step 3: Cross multiply
    1,965.75x = 2,711.12 × 1,179.24
  4. Step 4: Simplify right side
    1,965.75x = 3,197,055.25
  5. Step 5: Solve for x
    x = 3,197,055.25/1,965.75
  6. Step 6: Final answer
    x = 1,626.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.