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Finding the Fourth Proportional to 626.82, 865.20 and 440.36

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Solution

The fourth proportional to 626.82, 865.20 and 440.36 is: 607.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.82 : 865.20 = 440.36 : x
  2. Step 2: Convert to fraction form
    626.82/865.20 = 440.36/x
  3. Step 3: Cross multiply
    626.82x = 865.20 × 440.36
  4. Step 4: Simplify right side
    626.82x = 381,000.00
  5. Step 5: Solve for x
    x = 381,000.00/626.82
  6. Step 6: Final answer
    x = 607.83

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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.