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Finding the Fourth Proportional to 2,228.99, 3,342.56 and 842.09

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Solution

The fourth proportional to 2,228.99, 3,342.56 and 842.09 is: 1,262.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,228.99 : 3,342.56 = 842.09 : x
  2. Step 2: Convert to fraction form
    2,228.99/3,342.56 = 842.09/x
  3. Step 3: Cross multiply
    2,228.99x = 3,342.56 × 842.09
  4. Step 4: Simplify right side
    2,228.99x = 2,814,715.43
  5. Step 5: Solve for x
    x = 2,814,715.43/2,228.99
  6. Step 6: Final answer
    x = 1,262.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.