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Finding the Fourth Proportional to 398,755.38, 598,382.06 and 265,728.97

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Solution

The fourth proportional to 398,755.38, 598,382.06 and 265,728.97 is: 398,759.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,755.38 : 598,382.06 = 265,728.97 : x
  2. Step 2: Convert to fraction form
    398,755.38/598,382.06 = 265,728.97/x
  3. Step 3: Cross multiply
    398,755.38x = 598,382.06 × 265,728.97
  4. Step 4: Simplify right side
    398,755.38x = 159,007,448,470.28
  5. Step 5: Solve for x
    x = 159,007,448,470.28/398,755.38
  6. Step 6: Final answer
    x = 398,759.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.