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Finding the Fourth Proportional to 634.04, 874.60 and 385.16

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Solution

The fourth proportional to 634.04, 874.60 and 385.16 is: 531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.04 : 874.60 = 385.16 : x
  2. Step 2: Convert to fraction form
    634.04/874.60 = 385.16/x
  3. Step 3: Cross multiply
    634.04x = 874.60 × 385.16
  4. Step 4: Simplify right side
    634.04x = 336,860.94
  5. Step 5: Solve for x
    x = 336,860.94/634.04
  6. Step 6: Final answer
    x = 531.29

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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.