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Finding the Fourth Proportional to 634.25, 875.21 and 354.47

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Solution

The fourth proportional to 634.25, 875.21 and 354.47 is: 489.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.25 : 875.21 = 354.47 : x
  2. Step 2: Convert to fraction form
    634.25/875.21 = 354.47/x
  3. Step 3: Cross multiply
    634.25x = 875.21 × 354.47
  4. Step 4: Simplify right side
    634.25x = 310,229.54
  5. Step 5: Solve for x
    x = 310,229.54/634.25
  6. Step 6: Final answer
    x = 489.13

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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.