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Finding the Fourth Proportional to 207,953.70, 311,930.55 and 206,204.10

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Solution

The fourth proportional to 207,953.70, 311,930.55 and 206,204.10 is: 309,306.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,953.70 : 311,930.55 = 206,204.10 : x
  2. Step 2: Convert to fraction form
    207,953.70/311,930.55 = 206,204.10/x
  3. Step 3: Cross multiply
    207,953.70x = 311,930.55 × 206,204.10
  4. Step 4: Simplify right side
    207,953.70x = 64,321,358,325.26
  5. Step 5: Solve for x
    x = 64,321,358,325.26/207,953.70
  6. Step 6: Final answer
    x = 309,306.15

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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.