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Finding the Fourth Proportional to 627.75, 942.03 and 435.78

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Solution

The fourth proportional to 627.75, 942.03 and 435.78 is: 653.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.75 : 942.03 = 435.78 : x
  2. Step 2: Convert to fraction form
    627.75/942.03 = 435.78/x
  3. Step 3: Cross multiply
    627.75x = 942.03 × 435.78
  4. Step 4: Simplify right side
    627.75x = 410,517.83
  5. Step 5: Solve for x
    x = 410,517.83/627.75
  6. Step 6: Final answer
    x = 653.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.