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Finding the Fourth Proportional to 414,578.40, 622,021.20 and 399,218.40

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Solution

The fourth proportional to 414,578.40, 622,021.20 and 399,218.40 is: 598,975.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,578.40 : 622,021.20 = 399,218.40 : x
  2. Step 2: Convert to fraction form
    414,578.40/622,021.20 = 399,218.40/x
  3. Step 3: Cross multiply
    414,578.40x = 622,021.20 × 399,218.40
  4. Step 4: Simplify right side
    414,578.40x = 248,322,308,230.08
  5. Step 5: Solve for x
    x = 248,322,308,230.08/414,578.40
  6. Step 6: Final answer
    x = 598,975.51

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1.5x scale

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.