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Finding the Fourth Proportional to 394.28, 590.62 and 346.76

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Solution

The fourth proportional to 394.28, 590.62 and 346.76 is: 519.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.28 : 590.62 = 346.76 : x
  2. Step 2: Convert to fraction form
    394.28/590.62 = 346.76/x
  3. Step 3: Cross multiply
    394.28x = 590.62 × 346.76
  4. Step 4: Simplify right side
    394.28x = 204,803.39
  5. Step 5: Solve for x
    x = 204,803.39/394.28
  6. Step 6: Final answer
    x = 519.44

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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.