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Finding the Fourth Proportional to 207,983.80, 311,975.70 and 185,822.20

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Solution

The fourth proportional to 207,983.80, 311,975.70 and 185,822.20 is: 278,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,983.80 : 311,975.70 = 185,822.20 : x
  2. Step 2: Convert to fraction form
    207,983.80/311,975.70 = 185,822.20/x
  3. Step 3: Cross multiply
    207,983.80x = 311,975.70 × 185,822.20
  4. Step 4: Simplify right side
    207,983.80x = 57,972,010,920.54
  5. Step 5: Solve for x
    x = 57,972,010,920.54/207,983.80
  6. Step 6: Final answer
    x = 278,733.30

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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.