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Finding the Fourth Proportional to 627.78, 940.62 and 490.26

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Solution

The fourth proportional to 627.78, 940.62 and 490.26 is: 734.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.78 : 940.62 = 490.26 : x
  2. Step 2: Convert to fraction form
    627.78/940.62 = 490.26/x
  3. Step 3: Cross multiply
    627.78x = 940.62 × 490.26
  4. Step 4: Simplify right side
    627.78x = 461,148.36
  5. Step 5: Solve for x
    x = 461,148.36/627.78
  6. Step 6: Final answer
    x = 734.57

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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.