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Finding the Fourth Proportional to 339.29, 467.79 and 280.07

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Solution

The fourth proportional to 339.29, 467.79 and 280.07 is: 386.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.29 : 467.79 = 280.07 : x
  2. Step 2: Convert to fraction form
    339.29/467.79 = 280.07/x
  3. Step 3: Cross multiply
    339.29x = 467.79 × 280.07
  4. Step 4: Simplify right side
    339.29x = 131,013.95
  5. Step 5: Solve for x
    x = 131,013.95/339.29
  6. Step 6: Final answer
    x = 386.14

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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.