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Finding the Fourth Proportional to 398,759.58, 550,286.10 and 217,468.26

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Solution

The fourth proportional to 398,759.58, 550,286.10 and 217,468.26 is: 300,105.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,759.58 : 550,286.10 = 217,468.26 : x
  2. Step 2: Convert to fraction form
    398,759.58/550,286.10 = 217,468.26/x
  3. Step 3: Cross multiply
    398,759.58x = 550,286.10 × 217,468.26
  4. Step 4: Simplify right side
    398,759.58x = 119,669,760,669.19
  5. Step 5: Solve for x
    x = 119,669,760,669.19/398,759.58
  6. Step 6: Final answer
    x = 300,105.04

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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.