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Finding the Fourth Proportional to 293.50, 404.79 and 215.11

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Solution

The fourth proportional to 293.50, 404.79 and 215.11 is: 296.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.50 : 404.79 = 215.11 : x
  2. Step 2: Convert to fraction form
    293.50/404.79 = 215.11/x
  3. Step 3: Cross multiply
    293.50x = 404.79 × 215.11
  4. Step 4: Simplify right side
    293.50x = 87,074.38
  5. Step 5: Solve for x
    x = 87,074.38/293.50
  6. Step 6: Final answer
    x = 296.68

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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.