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Finding the Fourth Proportional to 697.80, 1,046.76 and 327.56

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Solution

The fourth proportional to 697.80, 1,046.76 and 327.56 is: 491.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.80 : 1,046.76 = 327.56 : x
  2. Step 2: Convert to fraction form
    697.80/1,046.76 = 327.56/x
  3. Step 3: Cross multiply
    697.80x = 1,046.76 × 327.56
  4. Step 4: Simplify right side
    697.80x = 342,876.71
  5. Step 5: Solve for x
    x = 342,876.71/697.80
  6. Step 6: Final answer
    x = 491.37

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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.