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Finding the Fourth Proportional to 393.05, 587.27 and 379.43

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Solution

The fourth proportional to 393.05, 587.27 and 379.43 is: 566.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.05 : 587.27 = 379.43 : x
  2. Step 2: Convert to fraction form
    393.05/587.27 = 379.43/x
  3. Step 3: Cross multiply
    393.05x = 587.27 × 379.43
  4. Step 4: Simplify right side
    393.05x = 222,827.86
  5. Step 5: Solve for x
    x = 222,827.86/393.05
  6. Step 6: Final answer
    x = 566.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.