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Finding the Fourth Proportional to 634.28, 875.34 and 354.53

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Solution

The fourth proportional to 634.28, 875.34 and 354.53 is: 489.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.28 : 875.34 = 354.53 : x
  2. Step 2: Convert to fraction form
    634.28/875.34 = 354.53/x
  3. Step 3: Cross multiply
    634.28x = 875.34 × 354.53
  4. Step 4: Simplify right side
    634.28x = 310,334.29
  5. Step 5: Solve for x
    x = 310,334.29/634.28
  6. Step 6: Final answer
    x = 489.27

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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.