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Finding the Fourth Proportional to 291,917.80, 436,904.70 and 211,727.80

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Solution

The fourth proportional to 291,917.80, 436,904.70 and 211,727.80 is: 316,886.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,917.80 : 436,904.70 = 211,727.80 : x
  2. Step 2: Convert to fraction form
    291,917.80/436,904.70 = 211,727.80/x
  3. Step 3: Cross multiply
    291,917.80x = 436,904.70 × 211,727.80
  4. Step 4: Simplify right side
    291,917.80x = 92,504,870,940.66
  5. Step 5: Solve for x
    x = 92,504,870,940.66/291,917.80
  6. Step 6: Final answer
    x = 316,886.71

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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.