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Finding the Fourth Proportional to 411,990.05, 618,384.62 and 198,908.21

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Solution

The fourth proportional to 411,990.05, 618,384.62 and 198,908.21 is: 298,555.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,990.05 : 618,384.62 = 198,908.21 : x
  2. Step 2: Convert to fraction form
    411,990.05/618,384.62 = 198,908.21/x
  3. Step 3: Cross multiply
    411,990.05x = 618,384.62 × 198,908.21
  4. Step 4: Simplify right side
    411,990.05x = 123,001,776,861.19
  5. Step 5: Solve for x
    x = 123,001,776,861.19/411,990.05
  6. Step 6: Final answer
    x = 298,555.21

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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.