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Finding the Fourth Proportional to 291,191.64, 436,789.88 and 91,507.56

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Solution

The fourth proportional to 291,191.64, 436,789.88 and 91,507.56 is: 137,262.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,191.64 : 436,789.88 = 91,507.56 : x
  2. Step 2: Convert to fraction form
    291,191.64/436,789.88 = 91,507.56/x
  3. Step 3: Cross multiply
    291,191.64x = 436,789.88 × 91,507.56
  4. Step 4: Simplify right side
    291,191.64x = 39,969,576,151.49
  5. Step 5: Solve for x
    x = 39,969,576,151.49/291,191.64
  6. Step 6: Final answer
    x = 137,262.10

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1.5x scale

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.