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Finding the Fourth Proportional to 339.67, 467.81 and 287.04

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Solution

The fourth proportional to 339.67, 467.81 and 287.04 is: 395.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.67 : 467.81 = 287.04 : x
  2. Step 2: Convert to fraction form
    339.67/467.81 = 287.04/x
  3. Step 3: Cross multiply
    339.67x = 467.81 × 287.04
  4. Step 4: Simplify right side
    339.67x = 134,282.79
  5. Step 5: Solve for x
    x = 134,282.79/339.67
  6. Step 6: Final answer
    x = 395.33

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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.