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Finding the Fourth Proportional to 627.75, 940.95 and 318.92

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Solution

The fourth proportional to 627.75, 940.95 and 318.92 is: 478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.75 : 940.95 = 318.92 : x
  2. Step 2: Convert to fraction form
    627.75/940.95 = 318.92/x
  3. Step 3: Cross multiply
    627.75x = 940.95 × 318.92
  4. Step 4: Simplify right side
    627.75x = 300,083.07
  5. Step 5: Solve for x
    x = 300,083.07/627.75
  6. Step 6: Final answer
    x = 478.03

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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.