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Finding the Fourth Proportional to 398,793.74, 550,420.53 and 229,121.42

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Solution

The fourth proportional to 398,793.74, 550,420.53 and 229,121.42 is: 316,236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,793.74 : 550,420.53 = 229,121.42 : x
  2. Step 2: Convert to fraction form
    398,793.74/550,420.53 = 229,121.42/x
  3. Step 3: Cross multiply
    398,793.74x = 550,420.53 × 229,121.42
  4. Step 4: Simplify right side
    398,793.74x = 126,113,133,430.75
  5. Step 5: Solve for x
    x = 126,113,133,430.75/398,793.74
  6. Step 6: Final answer
    x = 316,236.49

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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.