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Finding the Fourth Proportional to 394.58, 592.08 and 189.12

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Solution

The fourth proportional to 394.58, 592.08 and 189.12 is: 283.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.58 : 592.08 = 189.12 : x
  2. Step 2: Convert to fraction form
    394.58/592.08 = 189.12/x
  3. Step 3: Cross multiply
    394.58x = 592.08 × 189.12
  4. Step 4: Simplify right side
    394.58x = 111,973.95
  5. Step 5: Solve for x
    x = 111,973.95/394.58
  6. Step 6: Final answer
    x = 283.78

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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.