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Finding the Fourth Proportional to 207,959.70, 311,939.55 and 206,210.10

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Solution

The fourth proportional to 207,959.70, 311,939.55 and 206,210.10 is: 309,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,959.70 : 311,939.55 = 206,210.10 : x
  2. Step 2: Convert to fraction form
    207,959.70/311,939.55 = 206,210.10/x
  3. Step 3: Cross multiply
    207,959.70x = 311,939.55 × 206,210.10
  4. Step 4: Simplify right side
    207,959.70x = 64,325,085,799.46
  5. Step 5: Solve for x
    x = 64,325,085,799.46/207,959.70
  6. Step 6: Final answer
    x = 309,315.15

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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.