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Finding the Fourth Proportional to 291,115.80, 400,800.78 and 226,505.88

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Solution

The fourth proportional to 291,115.80, 400,800.78 and 226,505.88 is: 311,847.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,115.80 : 400,800.78 = 226,505.88 : x
  2. Step 2: Convert to fraction form
    291,115.80/400,800.78 = 226,505.88/x
  3. Step 3: Cross multiply
    291,115.80x = 400,800.78 × 226,505.88
  4. Step 4: Simplify right side
    291,115.80x = 90,783,733,378.59
  5. Step 5: Solve for x
    x = 90,783,733,378.59/291,115.80
  6. Step 6: Final answer
    x = 311,847.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.