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Finding the Fourth Proportional to 722.52, 996.57 and 489.24

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Solution

The fourth proportional to 722.52, 996.57 and 489.24 is: 674.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.52 : 996.57 = 489.24 : x
  2. Step 2: Convert to fraction form
    722.52/996.57 = 489.24/x
  3. Step 3: Cross multiply
    722.52x = 996.57 × 489.24
  4. Step 4: Simplify right side
    722.52x = 487,561.91
  5. Step 5: Solve for x
    x = 487,561.91/722.52
  6. Step 6: Final answer
    x = 674.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.