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Finding the Fourth Proportional to 282.87, 421.92 and 269.10

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Solution

The fourth proportional to 282.87, 421.92 and 269.10 is: 401.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.87 : 421.92 = 269.10 : x
  2. Step 2: Convert to fraction form
    282.87/421.92 = 269.10/x
  3. Step 3: Cross multiply
    282.87x = 421.92 × 269.10
  4. Step 4: Simplify right side
    282.87x = 113,538.67
  5. Step 5: Solve for x
    x = 113,538.67/282.87
  6. Step 6: Final answer
    x = 401.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.