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Finding the Fourth Proportional to 633.31, 874.38 and 397.58

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Solution

The fourth proportional to 633.31, 874.38 and 397.58 is: 548.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.31 : 874.38 = 397.58 : x
  2. Step 2: Convert to fraction form
    633.31/874.38 = 397.58/x
  3. Step 3: Cross multiply
    633.31x = 874.38 × 397.58
  4. Step 4: Simplify right side
    633.31x = 347,634.01
  5. Step 5: Solve for x
    x = 347,634.01/633.31
  6. Step 6: Final answer
    x = 548.92

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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.