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Finding the Fourth Proportional to 1,374.05, 2,061.44 and 449.48

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Solution

The fourth proportional to 1,374.05, 2,061.44 and 449.48 is: 674.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.05 : 2,061.44 = 449.48 : x
  2. Step 2: Convert to fraction form
    1,374.05/2,061.44 = 449.48/x
  3. Step 3: Cross multiply
    1,374.05x = 2,061.44 × 449.48
  4. Step 4: Simplify right side
    1,374.05x = 926,563.50
  5. Step 5: Solve for x
    x = 926,563.50/1,374.05
  6. Step 6: Final answer
    x = 674.33

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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.