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Finding the Fourth Proportional to 322,468.45, 483,713.60 and 85,811.36

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Solution

The fourth proportional to 322,468.45, 483,713.60 and 85,811.36 is: 128,719.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,468.45 : 483,713.60 = 85,811.36 : x
  2. Step 2: Convert to fraction form
    322,468.45/483,713.60 = 85,811.36/x
  3. Step 3: Cross multiply
    322,468.45x = 483,713.60 × 85,811.36
  4. Step 4: Simplify right side
    322,468.45x = 41,508,120,620.66
  5. Step 5: Solve for x
    x = 41,508,120,620.66/322,468.45
  6. Step 6: Final answer
    x = 128,719.94

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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.