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Finding the Fourth Proportional to 720,895.09, 994,792.48 and 398,579.89

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Solution

The fourth proportional to 720,895.09, 994,792.48 and 398,579.89 is: 550,016.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,895.09 : 994,792.48 = 398,579.89 : x
  2. Step 2: Convert to fraction form
    720,895.09/994,792.48 = 398,579.89/x
  3. Step 3: Cross multiply
    720,895.09x = 994,792.48 × 398,579.89
  4. Step 4: Simplify right side
    720,895.09x = 396,504,277,251.23
  5. Step 5: Solve for x
    x = 396,504,277,251.23/720,895.09
  6. Step 6: Final answer
    x = 550,016.62

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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.