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Finding the Fourth Proportional to 207,956.70, 311,935.05 and 172,964.70

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Solution

The fourth proportional to 207,956.70, 311,935.05 and 172,964.70 is: 259,447.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,956.70 : 311,935.05 = 172,964.70 : x
  2. Step 2: Convert to fraction form
    207,956.70/311,935.05 = 172,964.70/x
  3. Step 3: Cross multiply
    207,956.70x = 311,935.05 × 172,964.70
  4. Step 4: Simplify right side
    207,956.70x = 53,953,752,342.74
  5. Step 5: Solve for x
    x = 53,953,752,342.74/207,956.70
  6. Step 6: Final answer
    x = 259,447.05

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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.