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Finding the Fourth Proportional to 398,766.39, 550,481.90 and 245,831.91

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Solution

The fourth proportional to 398,766.39, 550,481.90 and 245,831.91 is: 339,361.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,766.39 : 550,481.90 = 245,831.91 : x
  2. Step 2: Convert to fraction form
    398,766.39/550,481.90 = 245,831.91/x
  3. Step 3: Cross multiply
    398,766.39x = 550,481.90 × 245,831.91
  4. Step 4: Simplify right side
    398,766.39x = 135,326,016,897.43
  5. Step 5: Solve for x
    x = 135,326,016,897.43/398,766.39
  6. Step 6: Final answer
    x = 339,361.64

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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.