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Finding the Fourth Proportional to 293.20, 404.30 and 286.52

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Solution

The fourth proportional to 293.20, 404.30 and 286.52 is: 395.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.20 : 404.30 = 286.52 : x
  2. Step 2: Convert to fraction form
    293.20/404.30 = 286.52/x
  3. Step 3: Cross multiply
    293.20x = 404.30 × 286.52
  4. Step 4: Simplify right side
    293.20x = 115,840.04
  5. Step 5: Solve for x
    x = 115,840.04/293.20
  6. Step 6: Final answer
    x = 395.09

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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.