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Finding the Fourth Proportional to 282.11, 389.28 and 219.94

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Solution

The fourth proportional to 282.11, 389.28 and 219.94 is: 303.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.11 : 389.28 = 219.94 : x
  2. Step 2: Convert to fraction form
    282.11/389.28 = 219.94/x
  3. Step 3: Cross multiply
    282.11x = 389.28 × 219.94
  4. Step 4: Simplify right side
    282.11x = 85,618.24
  5. Step 5: Solve for x
    x = 85,618.24/282.11
  6. Step 6: Final answer
    x = 303.49

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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.