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Finding the Fourth Proportional to 398,772.28, 550,290.52 and 219,924.28

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Solution

The fourth proportional to 398,772.28, 550,290.52 and 219,924.28 is: 303,487.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,772.28 : 550,290.52 = 219,924.28 : x
  2. Step 2: Convert to fraction form
    398,772.28/550,290.52 = 219,924.28/x
  3. Step 3: Cross multiply
    398,772.28x = 550,290.52 × 219,924.28
  4. Step 4: Simplify right side
    398,772.28x = 121,022,246,401.83
  5. Step 5: Solve for x
    x = 121,022,246,401.83/398,772.28
  6. Step 6: Final answer
    x = 303,487.11

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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.