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Finding the Fourth Proportional to 398,636.28, 550,122.36 and 217,346.73

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Solution

The fourth proportional to 398,636.28, 550,122.36 and 217,346.73 is: 299,940.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,636.28 : 550,122.36 = 217,346.73 : x
  2. Step 2: Convert to fraction form
    398,636.28/550,122.36 = 217,346.73/x
  3. Step 3: Cross multiply
    398,636.28x = 550,122.36 × 217,346.73
  4. Step 4: Simplify right side
    398,636.28x = 119,567,296,045.88
  5. Step 5: Solve for x
    x = 119,567,296,045.88/398,636.28
  6. Step 6: Final answer
    x = 299,940.83

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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.