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Finding the Fourth Proportional to 293.72, 404.46 and 287.33

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Solution

The fourth proportional to 293.72, 404.46 and 287.33 is: 395.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.72 : 404.46 = 287.33 : x
  2. Step 2: Convert to fraction form
    293.72/404.46 = 287.33/x
  3. Step 3: Cross multiply
    293.72x = 404.46 × 287.33
  4. Step 4: Simplify right side
    293.72x = 116,211.47
  5. Step 5: Solve for x
    x = 116,211.47/293.72
  6. Step 6: Final answer
    x = 395.66

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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.