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Finding the Fourth Proportional to 627.74, 941.63 and 318.72

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Solution

The fourth proportional to 627.74, 941.63 and 318.72 is: 478.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.74 : 941.63 = 318.72 : x
  2. Step 2: Convert to fraction form
    627.74/941.63 = 318.72/x
  3. Step 3: Cross multiply
    627.74x = 941.63 × 318.72
  4. Step 4: Simplify right side
    627.74x = 300,114.72
  5. Step 5: Solve for x
    x = 300,114.72/627.74
  6. Step 6: Final answer
    x = 478.09

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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.