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Finding the Fourth Proportional to 282.69, 389.88 and 199.73

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Solution

The fourth proportional to 282.69, 389.88 and 199.73 is: 275.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.69 : 389.88 = 199.73 : x
  2. Step 2: Convert to fraction form
    282.69/389.88 = 199.73/x
  3. Step 3: Cross multiply
    282.69x = 389.88 × 199.73
  4. Step 4: Simplify right side
    282.69x = 77,871.71
  5. Step 5: Solve for x
    x = 77,871.71/282.69
  6. Step 6: Final answer
    x = 275.47

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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.