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Finding the Fourth Proportional to 282.87, 390.33 and 166.41

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Solution

The fourth proportional to 282.87, 390.33 and 166.41 is: 229.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.87 : 390.33 = 166.41 : x
  2. Step 2: Convert to fraction form
    282.87/390.33 = 166.41/x
  3. Step 3: Cross multiply
    282.87x = 390.33 × 166.41
  4. Step 4: Simplify right side
    282.87x = 64,954.82
  5. Step 5: Solve for x
    x = 64,954.82/282.87
  6. Step 6: Final answer
    x = 229.63

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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.