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Finding the Fourth Proportional to 291,179.91, 436,788.71 and 91,508.64

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Solution

The fourth proportional to 291,179.91, 436,788.71 and 91,508.64 is: 137,268.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,179.91 : 436,788.71 = 91,508.64 : x
  2. Step 2: Convert to fraction form
    291,179.91/436,788.71 = 91,508.64/x
  3. Step 3: Cross multiply
    291,179.91x = 436,788.71 × 91,508.64
  4. Step 4: Simplify right side
    291,179.91x = 39,969,940,361.91
  5. Step 5: Solve for x
    x = 39,969,940,361.91/291,179.91
  6. Step 6: Final answer
    x = 137,268.88

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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.