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Finding the Fourth Proportional to 627.62, 935.89 and 613.64

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Solution

The fourth proportional to 627.62, 935.89 and 613.64 is: 915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.62 : 935.89 = 613.64 : x
  2. Step 2: Convert to fraction form
    627.62/935.89 = 613.64/x
  3. Step 3: Cross multiply
    627.62x = 935.89 × 613.64
  4. Step 4: Simplify right side
    627.62x = 574,300.35
  5. Step 5: Solve for x
    x = 574,300.35/627.62
  6. Step 6: Final answer
    x = 915.05

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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.