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Finding the Fourth Proportional to 398,774.28, 550,293.30 and 219,926.28

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Solution

The fourth proportional to 398,774.28, 550,293.30 and 219,926.28 is: 303,489.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,774.28 : 550,293.30 = 219,926.28 : x
  2. Step 2: Convert to fraction form
    398,774.28/550,293.30 = 219,926.28/x
  3. Step 3: Cross multiply
    398,774.28x = 550,293.30 × 219,926.28
  4. Step 4: Simplify right side
    398,774.28x = 121,023,958,377.92
  5. Step 5: Solve for x
    x = 121,023,958,377.92/398,774.28
  6. Step 6: Final answer
    x = 303,489.88

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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.