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Finding the Fourth Proportional to 398,770.90, 550,488.12 and 245,836.42

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Solution

The fourth proportional to 398,770.90, 550,488.12 and 245,836.42 is: 339,367.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,770.90 : 550,488.12 = 245,836.42 : x
  2. Step 2: Convert to fraction form
    398,770.90/550,488.12 = 245,836.42/x
  3. Step 3: Cross multiply
    398,770.90x = 550,488.12 × 245,836.42
  4. Step 4: Simplify right side
    398,770.90x = 135,330,028,673.33
  5. Step 5: Solve for x
    x = 135,330,028,673.33/398,770.90
  6. Step 6: Final answer
    x = 339,367.86

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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.