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Finding the Fourth Proportional to 395,198.70, 545,373.59 and 213,910.44

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Solution

The fourth proportional to 395,198.70, 545,373.59 and 213,910.44 is: 295,196.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,198.70 : 545,373.59 = 213,910.44 : x
  2. Step 2: Convert to fraction form
    395,198.70/545,373.59 = 213,910.44/x
  3. Step 3: Cross multiply
    395,198.70x = 545,373.59 × 213,910.44
  4. Step 4: Simplify right side
    395,198.70x = 116,661,103,531.73
  5. Step 5: Solve for x
    x = 116,661,103,531.73/395,198.70
  6. Step 6: Final answer
    x = 295,196.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.