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Finding the Fourth Proportional to 394.07, 590.49 and 220.52

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Solution

The fourth proportional to 394.07, 590.49 and 220.52 is: 330.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.07 : 590.49 = 220.52 : x
  2. Step 2: Convert to fraction form
    394.07/590.49 = 220.52/x
  3. Step 3: Cross multiply
    394.07x = 590.49 × 220.52
  4. Step 4: Simplify right side
    394.07x = 130,216.33
  5. Step 5: Solve for x
    x = 130,216.33/394.07
  6. Step 6: Final answer
    x = 330.44

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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.