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Finding the Fourth Proportional to 257,879.20, 387,255 and 168,074.44

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Solution

The fourth proportional to 257,879.20, 387,255 and 168,074.44 is: 252,395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,879.20 : 387,255 = 168,074.44 : x
  2. Step 2: Convert to fraction form
    257,879.20/387,255 = 168,074.44/x
  3. Step 3: Cross multiply
    257,879.20x = 387,255 × 168,074.44
  4. Step 4: Simplify right side
    257,879.20x = 65,087,667,262.20
  5. Step 5: Solve for x
    x = 65,087,667,262.20/257,879.20
  6. Step 6: Final answer
    x = 252,395.96

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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.