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Finding the Fourth Proportional to 663,339.80, 995,139.30 and 263,912.60

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Solution

The fourth proportional to 663,339.80, 995,139.30 and 263,912.60 is: 395,920.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,339.80 : 995,139.30 = 263,912.60 : x
  2. Step 2: Convert to fraction form
    663,339.80/995,139.30 = 263,912.60/x
  3. Step 3: Cross multiply
    663,339.80x = 995,139.30 × 263,912.60
  4. Step 4: Simplify right side
    663,339.80x = 262,629,800,025.18
  5. Step 5: Solve for x
    x = 262,629,800,025.18/663,339.80
  6. Step 6: Final answer
    x = 395,920.46

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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.