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Finding the Fourth Proportional to 291,695.80, 436,571.70 and 211,505.80

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Solution

The fourth proportional to 291,695.80, 436,571.70 and 211,505.80 is: 316,553.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,695.80 : 436,571.70 = 211,505.80 : x
  2. Step 2: Convert to fraction form
    291,695.80/436,571.70 = 211,505.80/x
  3. Step 3: Cross multiply
    291,695.80x = 436,571.70 × 211,505.80
  4. Step 4: Simplify right side
    291,695.80x = 92,337,446,665.86
  5. Step 5: Solve for x
    x = 92,337,446,665.86/291,695.80
  6. Step 6: Final answer
    x = 316,553.91

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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.