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Finding the Fourth Proportional to 633.94, 874.90 and 385.21

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Solution

The fourth proportional to 633.94, 874.90 and 385.21 is: 531.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.94 : 874.90 = 385.21 : x
  2. Step 2: Convert to fraction form
    633.94/874.90 = 385.21/x
  3. Step 3: Cross multiply
    633.94x = 874.90 × 385.21
  4. Step 4: Simplify right side
    633.94x = 337,015.85
  5. Step 5: Solve for x
    x = 337,015.85/633.94
  6. Step 6: Final answer
    x = 531.62

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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.