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Finding the Fourth Proportional to 627.81, 865.47 and 440.73

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Solution

The fourth proportional to 627.81, 865.47 and 440.73 is: 607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.81 : 865.47 = 440.73 : x
  2. Step 2: Convert to fraction form
    627.81/865.47 = 440.73/x
  3. Step 3: Cross multiply
    627.81x = 865.47 × 440.73
  4. Step 4: Simplify right side
    627.81x = 381,438.59
  5. Step 5: Solve for x
    x = 381,438.59/627.81
  6. Step 6: Final answer
    x = 607.57

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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.