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Finding the Fourth Proportional to 291,640.56, 437,504.40 and 91,939.92

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Solution

The fourth proportional to 291,640.56, 437,504.40 and 91,939.92 is: 137,923.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,640.56 : 437,504.40 = 91,939.92 : x
  2. Step 2: Convert to fraction form
    291,640.56/437,504.40 = 91,939.92/x
  3. Step 3: Cross multiply
    291,640.56x = 437,504.40 × 91,939.92
  4. Step 4: Simplify right side
    291,640.56x = 40,224,119,535.65
  5. Step 5: Solve for x
    x = 40,224,119,535.65/291,640.56
  6. Step 6: Final answer
    x = 137,923.61

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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.