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Finding the Fourth Proportional to 312.26, 468.32 and 92.88

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Solution

The fourth proportional to 312.26, 468.32 and 92.88 is: 139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.26 : 468.32 = 92.88 : x
  2. Step 2: Convert to fraction form
    312.26/468.32 = 92.88/x
  3. Step 3: Cross multiply
    312.26x = 468.32 × 92.88
  4. Step 4: Simplify right side
    312.26x = 43,497.56
  5. Step 5: Solve for x
    x = 43,497.56/312.26
  6. Step 6: Final answer
    x = 139.30

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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.