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Finding the Fourth Proportional to 2,643.71, 3,965.57 and 695.75

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Solution

The fourth proportional to 2,643.71, 3,965.57 and 695.75 is: 1,043.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.71 : 3,965.57 = 695.75 : x
  2. Step 2: Convert to fraction form
    2,643.71/3,965.57 = 695.75/x
  3. Step 3: Cross multiply
    2,643.71x = 3,965.57 × 695.75
  4. Step 4: Simplify right side
    2,643.71x = 2,759,041.85
  5. Step 5: Solve for x
    x = 2,759,041.85/2,643.71
  6. Step 6: Final answer
    x = 1,043.63

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Similar ratio
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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.