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Finding the Fourth Proportional to 978,091.26, 1,467,141.95 and 445,239.64

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Solution

The fourth proportional to 978,091.26, 1,467,141.95 and 445,239.64 is: 667,861.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,091.26 : 1,467,141.95 = 445,239.64 : x
  2. Step 2: Convert to fraction form
    978,091.26/1,467,141.95 = 445,239.64/x
  3. Step 3: Cross multiply
    978,091.26x = 1,467,141.95 × 445,239.64
  4. Step 4: Simplify right side
    978,091.26x = 653,229,753,646.90
  5. Step 5: Solve for x
    x = 653,229,753,646.90/978,091.26
  6. Step 6: Final answer
    x = 667,861.76

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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.