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Finding the Fourth Proportional to 695.97, 1,043.96 and 209.03

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Solution

The fourth proportional to 695.97, 1,043.96 and 209.03 is: 313.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.97 : 1,043.96 = 209.03 : x
  2. Step 2: Convert to fraction form
    695.97/1,043.96 = 209.03/x
  3. Step 3: Cross multiply
    695.97x = 1,043.96 × 209.03
  4. Step 4: Simplify right side
    695.97x = 218,212.69
  5. Step 5: Solve for x
    x = 218,212.69/695.97
  6. Step 6: Final answer
    x = 313.54

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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.