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Finding the Fourth Proportional to 627.10, 940.20 and 261.70

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Solution

The fourth proportional to 627.10, 940.20 and 261.70 is: 392.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.10 : 940.20 = 261.70 : x
  2. Step 2: Convert to fraction form
    627.10/940.20 = 261.70/x
  3. Step 3: Cross multiply
    627.10x = 940.20 × 261.70
  4. Step 4: Simplify right side
    627.10x = 246,050.34
  5. Step 5: Solve for x
    x = 246,050.34/627.10
  6. Step 6: Final answer
    x = 392.36

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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.