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Finding the Fourth Proportional to 627.15, 940.21 and 262.21

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Solution

The fourth proportional to 627.15, 940.21 and 262.21 is: 393.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.15 : 940.21 = 262.21 : x
  2. Step 2: Convert to fraction form
    627.15/940.21 = 262.21/x
  3. Step 3: Cross multiply
    627.15x = 940.21 × 262.21
  4. Step 4: Simplify right side
    627.15x = 246,530.11
  5. Step 5: Solve for x
    x = 246,530.11/627.15
  6. Step 6: Final answer
    x = 393.10

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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.