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Finding the Fourth Proportional to 663,338.80, 995,137.80 and 263,911.60

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Solution

The fourth proportional to 663,338.80, 995,137.80 and 263,911.60 is: 395,918.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,338.80 : 995,137.80 = 263,911.60 : x
  2. Step 2: Convert to fraction form
    663,338.80/995,137.80 = 263,911.60/x
  3. Step 3: Cross multiply
    663,338.80x = 995,137.80 × 263,911.60
  4. Step 4: Simplify right side
    663,338.80x = 262,628,409,018.48
  5. Step 5: Solve for x
    x = 262,628,409,018.48/663,338.80
  6. Step 6: Final answer
    x = 395,918.96

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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.