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Finding the Fourth Proportional to 390.27, 584.55 and 194.97

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Solution

The fourth proportional to 390.27, 584.55 and 194.97 is: 292.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.27 : 584.55 = 194.97 : x
  2. Step 2: Convert to fraction form
    390.27/584.55 = 194.97/x
  3. Step 3: Cross multiply
    390.27x = 584.55 × 194.97
  4. Step 4: Simplify right side
    390.27x = 113,969.71
  5. Step 5: Solve for x
    x = 113,969.71/390.27
  6. Step 6: Final answer
    x = 292.03

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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.