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Finding the Fourth Proportional to 1,371.90, 2,057.59 and 447.33

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Solution

The fourth proportional to 1,371.90, 2,057.59 and 447.33 is: 670.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.90 : 2,057.59 = 447.33 : x
  2. Step 2: Convert to fraction form
    1,371.90/2,057.59 = 447.33/x
  3. Step 3: Cross multiply
    1,371.90x = 2,057.59 × 447.33
  4. Step 4: Simplify right side
    1,371.90x = 920,421.73
  5. Step 5: Solve for x
    x = 920,421.73/1,371.90
  6. Step 6: Final answer
    x = 670.91

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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.