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Finding the Fourth Proportional to 627.79, 941.63 and 281.15

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Solution

The fourth proportional to 627.79, 941.63 and 281.15 is: 421.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.79 : 941.63 = 281.15 : x
  2. Step 2: Convert to fraction form
    627.79/941.63 = 281.15/x
  3. Step 3: Cross multiply
    627.79x = 941.63 × 281.15
  4. Step 4: Simplify right side
    627.79x = 264,734.57
  5. Step 5: Solve for x
    x = 264,734.57/627.79
  6. Step 6: Final answer
    x = 421.69

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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.