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Finding the Fourth Proportional to 627.20, 940.29 and 383.64

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Solution

The fourth proportional to 627.20, 940.29 and 383.64 is: 575.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.20 : 940.29 = 383.64 : x
  2. Step 2: Convert to fraction form
    627.20/940.29 = 383.64/x
  3. Step 3: Cross multiply
    627.20x = 940.29 × 383.64
  4. Step 4: Simplify right side
    627.20x = 360,732.86
  5. Step 5: Solve for x
    x = 360,732.86/627.20
  6. Step 6: Final answer
    x = 575.15

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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.