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Finding the Fourth Proportional to 398,883.08, 550,449 and 229,128.12

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Solution

The fourth proportional to 398,883.08, 550,449 and 229,128.12 is: 316,191.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,883.08 : 550,449 = 229,128.12 : x
  2. Step 2: Convert to fraction form
    398,883.08/550,449 = 229,128.12/x
  3. Step 3: Cross multiply
    398,883.08x = 550,449 × 229,128.12
  4. Step 4: Simplify right side
    398,883.08x = 126,123,344,525.88
  5. Step 5: Solve for x
    x = 126,123,344,525.88/398,883.08
  6. Step 6: Final answer
    x = 316,191.26

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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.