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Finding the Fourth Proportional to 398,685.87, 598,028.81 and 273,647.79

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Solution

The fourth proportional to 398,685.87, 598,028.81 and 273,647.79 is: 410,471.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,685.87 : 598,028.81 = 273,647.79 : x
  2. Step 2: Convert to fraction form
    398,685.87/598,028.81 = 273,647.79/x
  3. Step 3: Cross multiply
    398,685.87x = 598,028.81 × 273,647.79
  4. Step 4: Simplify right side
    398,685.87x = 163,649,260,844.59
  5. Step 5: Solve for x
    x = 163,649,260,844.59/398,685.87
  6. Step 6: Final answer
    x = 410,471.69

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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.