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Finding the Fourth Proportional to 398,589.12, 550,067.76 and 245,596.32

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Solution

The fourth proportional to 398,589.12, 550,067.76 and 245,596.32 is: 338,932.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,589.12 : 550,067.76 = 245,596.32 : x
  2. Step 2: Convert to fraction form
    398,589.12/550,067.76 = 245,596.32/x
  3. Step 3: Cross multiply
    398,589.12x = 550,067.76 × 245,596.32
  4. Step 4: Simplify right side
    398,589.12x = 135,094,617,606.64
  5. Step 5: Solve for x
    x = 135,094,617,606.64/398,589.12
  6. Step 6: Final answer
    x = 338,932.03

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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.