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Finding the Fourth Proportional to 291,180.91, 436,790.21 and 91,509.64

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Solution

The fourth proportional to 291,180.91, 436,790.21 and 91,509.64 is: 137,270.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,180.91 : 436,790.21 = 91,509.64 : x
  2. Step 2: Convert to fraction form
    291,180.91/436,790.21 = 91,509.64/x
  3. Step 3: Cross multiply
    291,180.91x = 436,790.21 × 91,509.64
  4. Step 4: Simplify right side
    291,180.91x = 39,970,514,872.62
  5. Step 5: Solve for x
    x = 39,970,514,872.62/291,180.91
  6. Step 6: Final answer
    x = 137,270.38

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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.