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Finding the Fourth Proportional to 445,287.16, 667,865.94 and 129,659.32

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Solution

The fourth proportional to 445,287.16, 667,865.94 and 129,659.32 is: 194,470.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,287.16 : 667,865.94 = 129,659.32 : x
  2. Step 2: Convert to fraction form
    445,287.16/667,865.94 = 129,659.32/x
  3. Step 3: Cross multiply
    445,287.16x = 667,865.94 × 129,659.32
  4. Step 4: Simplify right side
    445,287.16x = 86,595,043,631.56
  5. Step 5: Solve for x
    x = 86,595,043,631.56/445,287.16
  6. Step 6: Final answer
    x = 194,470.11

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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.