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Finding the Fourth Proportional to 291,855.80, 436,811.70 and 211,665.80

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Solution

The fourth proportional to 291,855.80, 436,811.70 and 211,665.80 is: 316,793.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,855.80 : 436,811.70 = 211,665.80 : x
  2. Step 2: Convert to fraction form
    291,855.80/436,811.70 = 211,665.80/x
  3. Step 3: Cross multiply
    291,855.80x = 436,811.70 × 211,665.80
  4. Step 4: Simplify right side
    291,855.80x = 92,458,097,929.86
  5. Step 5: Solve for x
    x = 92,458,097,929.86/291,855.80
  6. Step 6: Final answer
    x = 316,793.77

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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.