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Finding the Fourth Proportional to 322,447.92, 483,671.12 and 85,790.64

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Solution

The fourth proportional to 322,447.92, 483,671.12 and 85,790.64 is: 128,685.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,447.92 : 483,671.12 = 85,790.64 : x
  2. Step 2: Convert to fraction form
    322,447.92/483,671.12 = 85,790.64/x
  3. Step 3: Cross multiply
    322,447.92x = 483,671.12 × 85,790.64
  4. Step 4: Simplify right side
    322,447.92x = 41,494,454,934.32
  5. Step 5: Solve for x
    x = 41,494,454,934.32/322,447.92
  6. Step 6: Final answer
    x = 128,685.76

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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.