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Finding the Fourth Proportional to 312.27, 468.34 and 92.89

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Solution

The fourth proportional to 312.27, 468.34 and 92.89 is: 139.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.27 : 468.34 = 92.89 : x
  2. Step 2: Convert to fraction form
    312.27/468.34 = 92.89/x
  3. Step 3: Cross multiply
    312.27x = 468.34 × 92.89
  4. Step 4: Simplify right side
    312.27x = 43,504.10
  5. Step 5: Solve for x
    x = 43,504.10/312.27
  6. Step 6: Final answer
    x = 139.32

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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.