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Finding the Fourth Proportional to 978,249.78, 1,466,635.23 and 641,375.19

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Solution

The fourth proportional to 978,249.78, 1,466,635.23 and 641,375.19 is: 961,577.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,249.78 : 1,466,635.23 = 641,375.19 : x
  2. Step 2: Convert to fraction form
    978,249.78/1,466,635.23 = 641,375.19/x
  3. Step 3: Cross multiply
    978,249.78x = 1,466,635.23 × 641,375.19
  4. Step 4: Simplify right side
    978,249.78x = 940,663,449,301.94
  5. Step 5: Solve for x
    x = 940,663,449,301.94/978,249.78
  6. Step 6: Final answer
    x = 961,577.98

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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.