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Finding the Fourth Proportional to 627.61, 940.74 and 311.22

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Solution

The fourth proportional to 627.61, 940.74 and 311.22 is: 466.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.61 : 940.74 = 311.22 : x
  2. Step 2: Convert to fraction form
    627.61/940.74 = 311.22/x
  3. Step 3: Cross multiply
    627.61x = 940.74 × 311.22
  4. Step 4: Simplify right side
    627.61x = 292,777.10
  5. Step 5: Solve for x
    x = 292,777.10/627.61
  6. Step 6: Final answer
    x = 466.50

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Double scale
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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.