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Finding the Fourth Proportional to 633.91, 874.86 and 385.29

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Solution

The fourth proportional to 633.91, 874.86 and 385.29 is: 531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.91 : 874.86 = 385.29 : x
  2. Step 2: Convert to fraction form
    633.91/874.86 = 385.29/x
  3. Step 3: Cross multiply
    633.91x = 874.86 × 385.29
  4. Step 4: Simplify right side
    633.91x = 337,074.81
  5. Step 5: Solve for x
    x = 337,074.81/633.91
  6. Step 6: Final answer
    x = 531.74

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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.