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Finding the Fourth Proportional to 379.81, 524.06 and 213.95

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Solution

The fourth proportional to 379.81, 524.06 and 213.95 is: 295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.81 : 524.06 = 213.95 : x
  2. Step 2: Convert to fraction form
    379.81/524.06 = 213.95/x
  3. Step 3: Cross multiply
    379.81x = 524.06 × 213.95
  4. Step 4: Simplify right side
    379.81x = 112,121.57
  5. Step 5: Solve for x
    x = 112,121.57/379.81
  6. Step 6: Final answer
    x = 295.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.