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Finding the Fourth Proportional to 634.03, 874.65 and 397.85

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Solution

The fourth proportional to 634.03, 874.65 and 397.85 is: 548.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.03 : 874.65 = 397.85 : x
  2. Step 2: Convert to fraction form
    634.03/874.65 = 397.85/x
  3. Step 3: Cross multiply
    634.03x = 874.65 × 397.85
  4. Step 4: Simplify right side
    634.03x = 347,981.69
  5. Step 5: Solve for x
    x = 347,981.69/634.03
  6. Step 6: Final answer
    x = 548.84

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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.