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Finding the Fourth Proportional to 348.36, 479.99 and 269.69

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Solution

The fourth proportional to 348.36, 479.99 and 269.69 is: 371.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.36 : 479.99 = 269.69 : x
  2. Step 2: Convert to fraction form
    348.36/479.99 = 269.69/x
  3. Step 3: Cross multiply
    348.36x = 479.99 × 269.69
  4. Step 4: Simplify right side
    348.36x = 129,444.75
  5. Step 5: Solve for x
    x = 129,444.75/348.36
  6. Step 6: Final answer
    x = 371.58

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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.