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Finding the Fourth Proportional to 835.58, 1,254.34 and 489.17

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Solution

The fourth proportional to 835.58, 1,254.34 and 489.17 is: 734.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.58 : 1,254.34 = 489.17 : x
  2. Step 2: Convert to fraction form
    835.58/1,254.34 = 489.17/x
  3. Step 3: Cross multiply
    835.58x = 1,254.34 × 489.17
  4. Step 4: Simplify right side
    835.58x = 613,578.00
  5. Step 5: Solve for x
    x = 613,578.00/835.58
  6. Step 6: Final answer
    x = 734.31

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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.