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Finding the Fourth Proportional to 408,466.20, 611,489.70 and 303,749.40

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Solution

The fourth proportional to 408,466.20, 611,489.70 and 303,749.40 is: 454,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,466.20 : 611,489.70 = 303,749.40 : x
  2. Step 2: Convert to fraction form
    408,466.20/611,489.70 = 303,749.40/x
  3. Step 3: Cross multiply
    408,466.20x = 611,489.70 × 303,749.40
  4. Step 4: Simplify right side
    408,466.20x = 185,739,629,481.18
  5. Step 5: Solve for x
    x = 185,739,629,481.18/408,466.20
  6. Step 6: Final answer
    x = 454,724.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.