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Finding the Fourth Proportional to 617.82, 851.94 and 440.88

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Solution

The fourth proportional to 617.82, 851.94 and 440.88 is: 607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.82 : 851.94 = 440.88 : x
  2. Step 2: Convert to fraction form
    617.82/851.94 = 440.88/x
  3. Step 3: Cross multiply
    617.82x = 851.94 × 440.88
  4. Step 4: Simplify right side
    617.82x = 375,603.31
  5. Step 5: Solve for x
    x = 375,603.31/617.82
  6. Step 6: Final answer
    x = 607.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.