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Finding the Fourth Proportional to 627.91, 940.49 and 383.69

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Solution

The fourth proportional to 627.91, 940.49 and 383.69 is: 574.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.91 : 940.49 = 383.69 : x
  2. Step 2: Convert to fraction form
    627.91/940.49 = 383.69/x
  3. Step 3: Cross multiply
    627.91x = 940.49 × 383.69
  4. Step 4: Simplify right side
    627.91x = 360,857.04
  5. Step 5: Solve for x
    x = 360,857.04/627.91
  6. Step 6: Final answer
    x = 574.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.