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Finding the Fourth Proportional to 338.96, 466.76 and 287.12

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Solution

The fourth proportional to 338.96, 466.76 and 287.12 is: 395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.96 : 466.76 = 287.12 : x
  2. Step 2: Convert to fraction form
    338.96/466.76 = 287.12/x
  3. Step 3: Cross multiply
    338.96x = 466.76 × 287.12
  4. Step 4: Simplify right side
    338.96x = 134,016.13
  5. Step 5: Solve for x
    x = 134,016.13/338.96
  6. Step 6: Final answer
    x = 395.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.