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Finding the Fourth Proportional to 445,391.56, 668,147.46 and 129,845.98

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Solution

The fourth proportional to 445,391.56, 668,147.46 and 129,845.98 is: 194,786.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,391.56 : 668,147.46 = 129,845.98 : x
  2. Step 2: Convert to fraction form
    445,391.56/668,147.46 = 129,845.98/x
  3. Step 3: Cross multiply
    445,391.56x = 668,147.46 × 129,845.98
  4. Step 4: Simplify right side
    445,391.56x = 86,756,261,728.21
  5. Step 5: Solve for x
    x = 86,756,261,728.21/445,391.56
  6. Step 6: Final answer
    x = 194,786.50

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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.