Home / 215,815.20-323,799.60-208,135.20

Finding the Fourth Proportional to 215,815.20, 323,799.60 and 208,135.20

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Solution

The fourth proportional to 215,815.20, 323,799.60 and 208,135.20 is: 312,276.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,815.20 : 323,799.60 = 208,135.20 : x
  2. Step 2: Convert to fraction form
    215,815.20/323,799.60 = 208,135.20/x
  3. Step 3: Cross multiply
    215,815.20x = 323,799.60 × 208,135.20
  4. Step 4: Simplify right side
    215,815.20x = 67,394,094,505.92
  5. Step 5: Solve for x
    x = 67,394,094,505.92/215,815.20
  6. Step 6: Final answer
    x = 312,276.87

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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.