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Finding the Fourth Proportional to 398,982.72, 550,595.35 and 217,694.55

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Solution

The fourth proportional to 398,982.72, 550,595.35 and 217,694.55 is: 300,418.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,982.72 : 550,595.35 = 217,694.55 : x
  2. Step 2: Convert to fraction form
    398,982.72/550,595.35 = 217,694.55/x
  3. Step 3: Cross multiply
    398,982.72x = 550,595.35 × 217,694.55
  4. Step 4: Simplify right side
    398,982.72x = 119,861,604,029.28
  5. Step 5: Solve for x
    x = 119,861,604,029.28/398,982.72
  6. Step 6: Final answer
    x = 300,418.03

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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.