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Finding the Fourth Proportional to 348.13, 521.94 and 211.15

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Solution

The fourth proportional to 348.13, 521.94 and 211.15 is: 316.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.13 : 521.94 = 211.15 : x
  2. Step 2: Convert to fraction form
    348.13/521.94 = 211.15/x
  3. Step 3: Cross multiply
    348.13x = 521.94 × 211.15
  4. Step 4: Simplify right side
    348.13x = 110,205.02
  5. Step 5: Solve for x
    x = 110,205.02/348.13
  6. Step 6: Final answer
    x = 316.56

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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.