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Finding the Fourth Proportional to 348.29, 522.33 and 128.91

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Solution

The fourth proportional to 348.29, 522.33 and 128.91 is: 193.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.29 : 522.33 = 128.91 : x
  2. Step 2: Convert to fraction form
    348.29/522.33 = 128.91/x
  3. Step 3: Cross multiply
    348.29x = 522.33 × 128.91
  4. Step 4: Simplify right side
    348.29x = 67,333.56
  5. Step 5: Solve for x
    x = 67,333.56/348.29
  6. Step 6: Final answer
    x = 193.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.