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Finding the Fourth Proportional to 220,997.20, 331,495.80 and 186,005.20

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Solution

The fourth proportional to 220,997.20, 331,495.80 and 186,005.20 is: 279,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,997.20 : 331,495.80 = 186,005.20 : x
  2. Step 2: Convert to fraction form
    220,997.20/331,495.80 = 186,005.20/x
  3. Step 3: Cross multiply
    220,997.20x = 331,495.80 × 186,005.20
  4. Step 4: Simplify right side
    220,997.20x = 61,659,942,578.16
  5. Step 5: Solve for x
    x = 61,659,942,578.16/220,997.20
  6. Step 6: Final answer
    x = 279,007.80

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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.