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Finding the Fourth Proportional to 663,388, 995,237.52 and 220,156

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Solution

The fourth proportional to 663,388, 995,237.52 and 220,156 is: 330,285.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,388 : 995,237.52 = 220,156 : x
  2. Step 2: Convert to fraction form
    663,388/995,237.52 = 220,156/x
  3. Step 3: Cross multiply
    663,388x = 995,237.52 × 220,156
  4. Step 4: Simplify right side
    663,388x = 219,107,511,453.12
  5. Step 5: Solve for x
    x = 219,107,511,453.12/663,388
  6. Step 6: Final answer
    x = 330,285.61

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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.