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Finding the Fourth Proportional to 618,961.19, 928,441.78 and 408,549.92

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Solution

The fourth proportional to 618,961.19, 928,441.78 and 408,549.92 is: 612,824.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,961.19 : 928,441.78 = 408,549.92 : x
  2. Step 2: Convert to fraction form
    618,961.19/928,441.78 = 408,549.92/x
  3. Step 3: Cross multiply
    618,961.19x = 928,441.78 × 408,549.92
  4. Step 4: Simplify right side
    618,961.19x = 379,314,809,280.07
  5. Step 5: Solve for x
    x = 379,314,809,280.07/618,961.19
  6. Step 6: Final answer
    x = 612,824.87

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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.