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Finding the Fourth Proportional to 398,618.60, 550,072.82 and 226,513.55

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Solution

The fourth proportional to 398,618.60, 550,072.82 and 226,513.55 is: 312,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,618.60 : 550,072.82 = 226,513.55 : x
  2. Step 2: Convert to fraction form
    398,618.60/550,072.82 = 226,513.55/x
  3. Step 3: Cross multiply
    398,618.60x = 550,072.82 × 226,513.55
  4. Step 4: Simplify right side
    398,618.60x = 124,598,943,333.78
  5. Step 5: Solve for x
    x = 124,598,943,333.78/398,618.60
  6. Step 6: Final answer
    x = 312,576.85

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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.