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Finding the Fourth Proportional to 398,846.44, 550,387.85 and 217,556.89

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Solution

The fourth proportional to 398,846.44, 550,387.85 and 217,556.89 is: 300,217.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,846.44 : 550,387.85 = 217,556.89 : x
  2. Step 2: Convert to fraction form
    398,846.44/550,387.85 = 217,556.89/x
  3. Step 3: Cross multiply
    398,846.44x = 550,387.85 × 217,556.89
  4. Step 4: Simplify right side
    398,846.44x = 119,740,668,939.79
  5. Step 5: Solve for x
    x = 119,740,668,939.79/398,846.44
  6. Step 6: Final answer
    x = 300,217.47

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1.5x scale

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.