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Finding the Fourth Proportional to 835.61, 1,252.98 and 489.02

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Solution

The fourth proportional to 835.61, 1,252.98 and 489.02 is: 733.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.61 : 1,252.98 = 489.02 : x
  2. Step 2: Convert to fraction form
    835.61/1,252.98 = 489.02/x
  3. Step 3: Cross multiply
    835.61x = 1,252.98 × 489.02
  4. Step 4: Simplify right side
    835.61x = 612,726.01
  5. Step 5: Solve for x
    x = 612,726.01/835.61
  6. Step 6: Final answer
    x = 733.27

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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.