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Finding the Fourth Proportional to 398,924.63, 550,514.79 and 217,635.27

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Solution

The fourth proportional to 398,924.63, 550,514.79 and 217,635.27 is: 300,336.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,924.63 : 550,514.79 = 217,635.27 : x
  2. Step 2: Convert to fraction form
    398,924.63/550,514.79 = 217,635.27/x
  3. Step 3: Cross multiply
    398,924.63x = 550,514.79 × 217,635.27
  4. Step 4: Simplify right side
    398,924.63x = 119,811,434,960.64
  5. Step 5: Solve for x
    x = 119,811,434,960.64/398,924.63
  6. Step 6: Final answer
    x = 300,336.02

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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.