Home / 1,372.30-2,057.40-447.30

Finding the Fourth Proportional to 1,372.30, 2,057.40 and 447.30

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Solution

The fourth proportional to 1,372.30, 2,057.40 and 447.30 is: 670.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.30 : 2,057.40 = 447.30 : x
  2. Step 2: Convert to fraction form
    1,372.30/2,057.40 = 447.30/x
  3. Step 3: Cross multiply
    1,372.30x = 2,057.40 × 447.30
  4. Step 4: Simplify right side
    1,372.30x = 920,275.02
  5. Step 5: Solve for x
    x = 920,275.02/1,372.30
  6. Step 6: Final answer
    x = 670.61

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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.