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Finding the Fourth Proportional to 618,311.70, 927,467.55 and 218,949.30

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Solution

The fourth proportional to 618,311.70, 927,467.55 and 218,949.30 is: 328,423.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,311.70 : 927,467.55 = 218,949.30 : x
  2. Step 2: Convert to fraction form
    618,311.70/927,467.55 = 218,949.30/x
  3. Step 3: Cross multiply
    618,311.70x = 927,467.55 × 218,949.30
  4. Step 4: Simplify right side
    618,311.70x = 203,068,370,845.22
  5. Step 5: Solve for x
    x = 203,068,370,845.22/618,311.70
  6. Step 6: Final answer
    x = 328,423.95

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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.