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Finding the Fourth Proportional to 398,706, 550,214.28 and 219,858

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Solution

The fourth proportional to 398,706, 550,214.28 and 219,858 is: 303,404.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,706 : 550,214.28 = 219,858 : x
  2. Step 2: Convert to fraction form
    398,706/550,214.28 = 219,858/x
  3. Step 3: Cross multiply
    398,706x = 550,214.28 × 219,858
  4. Step 4: Simplify right side
    398,706x = 120,969,011,172.24
  5. Step 5: Solve for x
    x = 120,969,011,172.24/398,706
  6. Step 6: Final answer
    x = 303,404.04

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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.