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Finding the Fourth Proportional to 398,608.74, 550,012.41 and 228,839.22

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Solution

The fourth proportional to 398,608.74, 550,012.41 and 228,839.22 is: 315,759.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,608.74 : 550,012.41 = 228,839.22 : x
  2. Step 2: Convert to fraction form
    398,608.74/550,012.41 = 228,839.22/x
  3. Step 3: Cross multiply
    398,608.74x = 550,012.41 × 228,839.22
  4. Step 4: Simplify right side
    398,608.74x = 125,864,410,894.72
  5. Step 5: Solve for x
    x = 125,864,410,894.72/398,608.74
  6. Step 6: Final answer
    x = 315,759.29

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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.