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Finding the Fourth Proportional to 282.15, 391.00 and 276.68

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Solution

The fourth proportional to 282.15, 391.00 and 276.68 is: 383.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.15 : 391.00 = 276.68 : x
  2. Step 2: Convert to fraction form
    282.15/391.00 = 276.68/x
  3. Step 3: Cross multiply
    282.15x = 391.00 × 276.68
  4. Step 4: Simplify right side
    282.15x = 108,181.81
  5. Step 5: Solve for x
    x = 108,181.81/282.15
  6. Step 6: Final answer
    x = 383.43

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.