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Finding the Fourth Proportional to 695.27, 1,043.35 and 330.47

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Solution

The fourth proportional to 695.27, 1,043.35 and 330.47 is: 495.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.27 : 1,043.35 = 330.47 : x
  2. Step 2: Convert to fraction form
    695.27/1,043.35 = 330.47/x
  3. Step 3: Cross multiply
    695.27x = 1,043.35 × 330.47
  4. Step 4: Simplify right side
    695.27x = 344,789.83
  5. Step 5: Solve for x
    x = 344,789.83/695.27
  6. Step 6: Final answer
    x = 495.91

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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.