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Finding the Fourth Proportional to 300.92, 415.15 and 212.53

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Solution

The fourth proportional to 300.92, 415.15 and 212.53 is: 293.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.92 : 415.15 = 212.53 : x
  2. Step 2: Convert to fraction form
    300.92/415.15 = 212.53/x
  3. Step 3: Cross multiply
    300.92x = 415.15 × 212.53
  4. Step 4: Simplify right side
    300.92x = 88,232.61
  5. Step 5: Solve for x
    x = 88,232.61/300.92
  6. Step 6: Final answer
    x = 293.21

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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.