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Finding the Fourth Proportional to 1,371.34, 2,057.82 and 447.58

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Solution

The fourth proportional to 1,371.34, 2,057.82 and 447.58 is: 671.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.34 : 2,057.82 = 447.58 : x
  2. Step 2: Convert to fraction form
    1,371.34/2,057.82 = 447.58/x
  3. Step 3: Cross multiply
    1,371.34x = 2,057.82 × 447.58
  4. Step 4: Simplify right side
    1,371.34x = 921,039.08
  5. Step 5: Solve for x
    x = 921,039.08/1,371.34
  6. Step 6: Final answer
    x = 671.63

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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.