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Finding the Fourth Proportional to 415,571.37, 623,392.43 and 131,185.85

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Solution

The fourth proportional to 415,571.37, 623,392.43 and 131,185.85 is: 196,789.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,571.37 : 623,392.43 = 131,185.85 : x
  2. Step 2: Convert to fraction form
    415,571.37/623,392.43 = 131,185.85/x
  3. Step 3: Cross multiply
    415,571.37x = 623,392.43 × 131,185.85
  4. Step 4: Simplify right side
    415,571.37x = 81,780,262,040.22
  5. Step 5: Solve for x
    x = 81,780,262,040.22/415,571.37
  6. Step 6: Final answer
    x = 196,789.93

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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.