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Finding the Fourth Proportional to 207,621.80, 311,808.14 and 191,809.80

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Solution

The fourth proportional to 207,621.80, 311,808.14 and 191,809.80 is: 288,061.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,621.80 : 311,808.14 = 191,809.80 : x
  2. Step 2: Convert to fraction form
    207,621.80/311,808.14 = 191,809.80/x
  3. Step 3: Cross multiply
    207,621.80x = 311,808.14 × 191,809.80
  4. Step 4: Simplify right side
    207,621.80x = 59,807,856,971.77
  5. Step 5: Solve for x
    x = 59,807,856,971.77/207,621.80
  6. Step 6: Final answer
    x = 288,061.55

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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.