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Finding the Fourth Proportional to 348.20, 521.98 and 155.72

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Solution

The fourth proportional to 348.20, 521.98 and 155.72 is: 233.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.20 : 521.98 = 155.72 : x
  2. Step 2: Convert to fraction form
    348.20/521.98 = 155.72/x
  3. Step 3: Cross multiply
    348.20x = 521.98 × 155.72
  4. Step 4: Simplify right side
    348.20x = 81,282.73
  5. Step 5: Solve for x
    x = 81,282.73/348.20
  6. Step 6: Final answer
    x = 233.44

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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.