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Finding the Fourth Proportional to 390.92, 586.22 and 195.75

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Solution

The fourth proportional to 390.92, 586.22 and 195.75 is: 293.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.92 : 586.22 = 195.75 : x
  2. Step 2: Convert to fraction form
    390.92/586.22 = 195.75/x
  3. Step 3: Cross multiply
    390.92x = 586.22 × 195.75
  4. Step 4: Simplify right side
    390.92x = 114,751.59
  5. Step 5: Solve for x
    x = 114,751.59/390.92
  6. Step 6: Final answer
    x = 293.55

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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.