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Finding the Fourth Proportional to 634.17, 875.03 and 401.25

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Solution

The fourth proportional to 634.17, 875.03 and 401.25 is: 553.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.17 : 875.03 = 401.25 : x
  2. Step 2: Convert to fraction form
    634.17/875.03 = 401.25/x
  3. Step 3: Cross multiply
    634.17x = 875.03 × 401.25
  4. Step 4: Simplify right side
    634.17x = 351,103.78
  5. Step 5: Solve for x
    x = 351,103.78/634.17
  6. Step 6: Final answer
    x = 553.64

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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.