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Finding the Fourth Proportional to 485,221.72, 669,610.44 and 267,438.16

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Solution

The fourth proportional to 485,221.72, 669,610.44 and 267,438.16 is: 369,067.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,221.72 : 669,610.44 = 267,438.16 : x
  2. Step 2: Convert to fraction form
    485,221.72/669,610.44 = 267,438.16/x
  3. Step 3: Cross multiply
    485,221.72x = 669,610.44 × 267,438.16
  4. Step 4: Simplify right side
    485,221.72x = 179,079,383,990.39
  5. Step 5: Solve for x
    x = 179,079,383,990.39/485,221.72
  6. Step 6: Final answer
    x = 369,067.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.