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Finding the Fourth Proportional to 627.40, 940.49 and 480.70

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Solution

The fourth proportional to 627.40, 940.49 and 480.70 is: 720.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.40 : 940.49 = 480.70 : x
  2. Step 2: Convert to fraction form
    627.40/940.49 = 480.70/x
  3. Step 3: Cross multiply
    627.40x = 940.49 × 480.70
  4. Step 4: Simplify right side
    627.40x = 452,093.54
  5. Step 5: Solve for x
    x = 452,093.54/627.40
  6. Step 6: Final answer
    x = 720.58

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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.