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Finding the Fourth Proportional to 282.13, 389.44 and 203.56

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Solution

The fourth proportional to 282.13, 389.44 and 203.56 is: 280.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.13 : 389.44 = 203.56 : x
  2. Step 2: Convert to fraction form
    282.13/389.44 = 203.56/x
  3. Step 3: Cross multiply
    282.13x = 389.44 × 203.56
  4. Step 4: Simplify right side
    282.13x = 79,273.69
  5. Step 5: Solve for x
    x = 79,273.69/282.13
  6. Step 6: Final answer
    x = 280.99

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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.