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Finding the Fourth Proportional to 627.90, 935.38 and 608.78

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Solution

The fourth proportional to 627.90, 935.38 and 608.78 is: 906.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.90 : 935.38 = 608.78 : x
  2. Step 2: Convert to fraction form
    627.90/935.38 = 608.78/x
  3. Step 3: Cross multiply
    627.90x = 935.38 × 608.78
  4. Step 4: Simplify right side
    627.90x = 569,434.44
  5. Step 5: Solve for x
    x = 569,434.44/627.90
  6. Step 6: Final answer
    x = 906.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.