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Finding the Fourth Proportional to 634.58, 875.63 and 354.78

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Solution

The fourth proportional to 634.58, 875.63 and 354.78 is: 489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.58 : 875.63 = 354.78 : x
  2. Step 2: Convert to fraction form
    634.58/875.63 = 354.78/x
  3. Step 3: Cross multiply
    634.58x = 875.63 × 354.78
  4. Step 4: Simplify right side
    634.58x = 310,654.24
  5. Step 5: Solve for x
    x = 310,654.24/634.58
  6. Step 6: Final answer
    x = 489.55

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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.