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Finding the Fourth Proportional to 836.87, 1,254.16 and 489.47

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Solution

The fourth proportional to 836.87, 1,254.16 and 489.47 is: 733.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.87 : 1,254.16 = 489.47 : x
  2. Step 2: Convert to fraction form
    836.87/1,254.16 = 489.47/x
  3. Step 3: Cross multiply
    836.87x = 1,254.16 × 489.47
  4. Step 4: Simplify right side
    836.87x = 613,873.70
  5. Step 5: Solve for x
    x = 613,873.70/836.87
  6. Step 6: Final answer
    x = 733.54

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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.