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Finding the Fourth Proportional to 381,879.72, 572,847.26 and 115,661.00

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Solution

The fourth proportional to 381,879.72, 572,847.26 and 115,661.00 is: 173,499.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,879.72 : 572,847.26 = 115,661.00 : x
  2. Step 2: Convert to fraction form
    381,879.72/572,847.26 = 115,661.00/x
  3. Step 3: Cross multiply
    381,879.72x = 572,847.26 × 115,661.00
  4. Step 4: Simplify right side
    381,879.72x = 66,256,083,496.32
  5. Step 5: Solve for x
    x = 66,256,083,496.32/381,879.72
  6. Step 6: Final answer
    x = 173,499.87

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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.