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Finding the Fourth Proportional to 291,218.28, 436,827.11 and 91,556.11

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Solution

The fourth proportional to 291,218.28, 436,827.11 and 91,556.11 is: 137,334.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,218.28 : 436,827.11 = 91,556.11 : x
  2. Step 2: Convert to fraction form
    291,218.28/436,827.11 = 91,556.11/x
  3. Step 3: Cross multiply
    291,218.28x = 436,827.11 × 91,556.11
  4. Step 4: Simplify right side
    291,218.28x = 39,994,190,934.14
  5. Step 5: Solve for x
    x = 39,994,190,934.14/291,218.28
  6. Step 6: Final answer
    x = 137,334.07

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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.