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Finding the Fourth Proportional to 618,922.80, 928,384.20 and 198,241.20

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Solution

The fourth proportional to 618,922.80, 928,384.20 and 198,241.20 is: 297,361.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,922.80 : 928,384.20 = 198,241.20 : x
  2. Step 2: Convert to fraction form
    618,922.80/928,384.20 = 198,241.20/x
  3. Step 3: Cross multiply
    618,922.80x = 928,384.20 × 198,241.20
  4. Step 4: Simplify right side
    618,922.80x = 184,043,997,869.04
  5. Step 5: Solve for x
    x = 184,043,997,869.04/618,922.80
  6. Step 6: Final answer
    x = 297,361.80

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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.