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Finding the Fourth Proportional to 984.96, 1,472.64 and 696

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Solution

The fourth proportional to 984.96, 1,472.64 and 696 is: 1,040.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.96 : 1,472.64 = 696 : x
  2. Step 2: Convert to fraction form
    984.96/1,472.64 = 696/x
  3. Step 3: Cross multiply
    984.96x = 1,472.64 × 696
  4. Step 4: Simplify right side
    984.96x = 1,024,957.44
  5. Step 5: Solve for x
    x = 1,024,957.44/984.96
  6. Step 6: Final answer
    x = 1,040.61

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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.