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Finding the Fourth Proportional to 811,894.86, 1,217,991.87 and 338,620.77

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Solution

The fourth proportional to 811,894.86, 1,217,991.87 and 338,620.77 is: 507,993.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,894.86 : 1,217,991.87 = 338,620.77 : x
  2. Step 2: Convert to fraction form
    811,894.86/1,217,991.87 = 338,620.77/x
  3. Step 3: Cross multiply
    811,894.86x = 1,217,991.87 × 338,620.77
  4. Step 4: Simplify right side
    811,894.86x = 412,437,344,873.14
  5. Step 5: Solve for x
    x = 412,437,344,873.14/811,894.86
  6. Step 6: Final answer
    x = 507,993.54

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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.