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Finding the Fourth Proportional to 634.34, 875.31 and 401.42

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Solution

The fourth proportional to 634.34, 875.31 and 401.42 is: 553.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.34 : 875.31 = 401.42 : x
  2. Step 2: Convert to fraction form
    634.34/875.31 = 401.42/x
  3. Step 3: Cross multiply
    634.34x = 875.31 × 401.42
  4. Step 4: Simplify right side
    634.34x = 351,366.94
  5. Step 5: Solve for x
    x = 351,366.94/634.34
  6. Step 6: Final answer
    x = 553.91

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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.