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Finding the Fourth Proportional to 282.82, 389.71 and 203.99

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Solution

The fourth proportional to 282.82, 389.71 and 203.99 is: 281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.82 : 389.71 = 203.99 : x
  2. Step 2: Convert to fraction form
    282.82/389.71 = 203.99/x
  3. Step 3: Cross multiply
    282.82x = 389.71 × 203.99
  4. Step 4: Simplify right side
    282.82x = 79,498.54
  5. Step 5: Solve for x
    x = 79,498.54/282.82
  6. Step 6: Final answer
    x = 281.10

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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.