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Finding the Fourth Proportional to 217,286.70, 325,930.05 and 208,538.70

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Solution

The fourth proportional to 217,286.70, 325,930.05 and 208,538.70 is: 312,808.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,286.70 : 325,930.05 = 208,538.70 : x
  2. Step 2: Convert to fraction form
    217,286.70/325,930.05 = 208,538.70/x
  3. Step 3: Cross multiply
    217,286.70x = 325,930.05 × 208,538.70
  4. Step 4: Simplify right side
    217,286.70x = 67,969,028,917.94
  5. Step 5: Solve for x
    x = 67,969,028,917.94/217,286.70
  6. Step 6: Final answer
    x = 312,808.05

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1.5x scale

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.