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Finding the Fourth Proportional to 2,643.39, 3,964.76 and 695.75

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Solution

The fourth proportional to 2,643.39, 3,964.76 and 695.75 is: 1,043.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.39 : 3,964.76 = 695.75 : x
  2. Step 2: Convert to fraction form
    2,643.39/3,964.76 = 695.75/x
  3. Step 3: Cross multiply
    2,643.39x = 3,964.76 × 695.75
  4. Step 4: Simplify right side
    2,643.39x = 2,758,463.69
  5. Step 5: Solve for x
    x = 2,758,463.69/2,643.39
  6. Step 6: Final answer
    x = 1,043.53

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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.