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Finding the Fourth Proportional to 627.28, 935.80 and 611.17

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Solution

The fourth proportional to 627.28, 935.80 and 611.17 is: 911.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.28 : 935.80 = 611.17 : x
  2. Step 2: Convert to fraction form
    627.28/935.80 = 611.17/x
  3. Step 3: Cross multiply
    627.28x = 935.80 × 611.17
  4. Step 4: Simplify right side
    627.28x = 571,928.21
  5. Step 5: Solve for x
    x = 571,928.21/627.28
  6. Step 6: Final answer
    x = 911.77

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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.