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Finding the Fourth Proportional to 394.72, 592.21 and 189.18

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Solution

The fourth proportional to 394.72, 592.21 and 189.18 is: 283.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.72 : 592.21 = 189.18 : x
  2. Step 2: Convert to fraction form
    394.72/592.21 = 189.18/x
  3. Step 3: Cross multiply
    394.72x = 592.21 × 189.18
  4. Step 4: Simplify right side
    394.72x = 112,034.29
  5. Step 5: Solve for x
    x = 112,034.29/394.72
  6. Step 6: Final answer
    x = 283.83

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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.