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Finding the Fourth Proportional to 2,643.34, 3,964.70 and 695.69

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Solution

The fourth proportional to 2,643.34, 3,964.70 and 695.69 is: 1,043.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.34 : 3,964.70 = 695.69 : x
  2. Step 2: Convert to fraction form
    2,643.34/3,964.70 = 695.69/x
  3. Step 3: Cross multiply
    2,643.34x = 3,964.70 × 695.69
  4. Step 4: Simplify right side
    2,643.34x = 2,758,221.23
  5. Step 5: Solve for x
    x = 2,758,221.23/2,643.34
  6. Step 6: Final answer
    x = 1,043.46

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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.