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Finding the Fourth Proportional to 348.31, 479.49 and 265.21

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Solution

The fourth proportional to 348.31, 479.49 and 265.21 is: 365.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.31 : 479.49 = 265.21 : x
  2. Step 2: Convert to fraction form
    348.31/479.49 = 265.21/x
  3. Step 3: Cross multiply
    348.31x = 479.49 × 265.21
  4. Step 4: Simplify right side
    348.31x = 127,165.54
  5. Step 5: Solve for x
    x = 127,165.54/348.31
  6. Step 6: Final answer
    x = 365.09

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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.