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Finding the Fourth Proportional to 1,424, 2,135.28 and 449.96

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Solution

The fourth proportional to 1,424, 2,135.28 and 449.96 is: 674.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424 : 2,135.28 = 449.96 : x
  2. Step 2: Convert to fraction form
    1,424/2,135.28 = 449.96/x
  3. Step 3: Cross multiply
    1,424x = 2,135.28 × 449.96
  4. Step 4: Simplify right side
    1,424x = 960,790.59
  5. Step 5: Solve for x
    x = 960,790.59/1,424
  6. Step 6: Final answer
    x = 674.71

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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.