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Finding the Fourth Proportional to 394.08, 591.24 and 386.88

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Solution

The fourth proportional to 394.08, 591.24 and 386.88 is: 580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.08 : 591.24 = 386.88 : x
  2. Step 2: Convert to fraction form
    394.08/591.24 = 386.88/x
  3. Step 3: Cross multiply
    394.08x = 591.24 × 386.88
  4. Step 4: Simplify right side
    394.08x = 228,738.93
  5. Step 5: Solve for x
    x = 228,738.93/394.08
  6. Step 6: Final answer
    x = 580.44

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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.