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Finding the Fourth Proportional to 398,792.22, 550,022.10 and 255,565.56

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Solution

The fourth proportional to 398,792.22, 550,022.10 and 255,565.56 is: 352,481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,792.22 : 550,022.10 = 255,565.56 : x
  2. Step 2: Convert to fraction form
    398,792.22/550,022.10 = 255,565.56/x
  3. Step 3: Cross multiply
    398,792.22x = 550,022.10 × 255,565.56
  4. Step 4: Simplify right side
    398,792.22x = 140,566,705,998.88
  5. Step 5: Solve for x
    x = 140,566,705,998.88/398,792.22
  6. Step 6: Final answer
    x = 352,481.06

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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.