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Finding the Fourth Proportional to 398,711.36, 550,265.52 and 245,718.56

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Solution

The fourth proportional to 398,711.36, 550,265.52 and 245,718.56 is: 339,118.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,711.36 : 550,265.52 = 245,718.56 : x
  2. Step 2: Convert to fraction form
    398,711.36/550,265.52 = 245,718.56/x
  3. Step 3: Cross multiply
    398,711.36x = 550,265.52 × 245,718.56
  4. Step 4: Simplify right side
    398,711.36x = 135,210,451,192.05
  5. Step 5: Solve for x
    x = 135,210,451,192.05/398,711.36
  6. Step 6: Final answer
    x = 339,118.63

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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.