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Finding the Fourth Proportional to 348.03, 521.82 and 128.61

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Solution

The fourth proportional to 348.03, 521.82 and 128.61 is: 192.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.03 : 521.82 = 128.61 : x
  2. Step 2: Convert to fraction form
    348.03/521.82 = 128.61/x
  3. Step 3: Cross multiply
    348.03x = 521.82 × 128.61
  4. Step 4: Simplify right side
    348.03x = 67,111.27
  5. Step 5: Solve for x
    x = 67,111.27/348.03
  6. Step 6: Final answer
    x = 192.83

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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.