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Finding the Fourth Proportional to 634.19, 875.15 and 354.42

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Solution

The fourth proportional to 634.19, 875.15 and 354.42 is: 489.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.19 : 875.15 = 354.42 : x
  2. Step 2: Convert to fraction form
    634.19/875.15 = 354.42/x
  3. Step 3: Cross multiply
    634.19x = 875.15 × 354.42
  4. Step 4: Simplify right side
    634.19x = 310,168.89
  5. Step 5: Solve for x
    x = 310,168.89/634.19
  6. Step 6: Final answer
    x = 489.08

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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.