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Finding the Fourth Proportional to 398,729.52, 550,239.84 and 217,442.88

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Solution

The fourth proportional to 398,729.52, 550,239.84 and 217,442.88 is: 300,067.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,729.52 : 550,239.84 = 217,442.88 : x
  2. Step 2: Convert to fraction form
    398,729.52/550,239.84 = 217,442.88/x
  3. Step 3: Cross multiply
    398,729.52x = 550,239.84 × 217,442.88
  4. Step 4: Simplify right side
    398,729.52x = 119,645,735,500.34
  5. Step 5: Solve for x
    x = 119,645,735,500.34/398,729.52
  6. Step 6: Final answer
    x = 300,067.41

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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.