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Finding the Fourth Proportional to 835.96, 1,252.80 and 489.54

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Solution

The fourth proportional to 835.96, 1,252.80 and 489.54 is: 733.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.96 : 1,252.80 = 489.54 : x
  2. Step 2: Convert to fraction form
    835.96/1,252.80 = 489.54/x
  3. Step 3: Cross multiply
    835.96x = 1,252.80 × 489.54
  4. Step 4: Simplify right side
    835.96x = 613,295.71
  5. Step 5: Solve for x
    x = 613,295.71/835.96
  6. Step 6: Final answer
    x = 733.64

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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.