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Finding the Fourth Proportional to 220,991.60, 331,776.48 and 131,198.24

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Solution

The fourth proportional to 220,991.60, 331,776.48 and 131,198.24 is: 196,968.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,991.60 : 331,776.48 = 131,198.24 : x
  2. Step 2: Convert to fraction form
    220,991.60/331,776.48 = 131,198.24/x
  3. Step 3: Cross multiply
    220,991.60x = 331,776.48 × 131,198.24
  4. Step 4: Simplify right side
    220,991.60x = 43,528,490,249.40
  5. Step 5: Solve for x
    x = 43,528,490,249.40/220,991.60
  6. Step 6: Final answer
    x = 196,968.98

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1.5x scale

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.