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Finding the Fourth Proportional to 618,960.50, 928,440.76 and 408,549.23

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Solution

The fourth proportional to 618,960.50, 928,440.76 and 408,549.23 is: 612,823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,960.50 : 928,440.76 = 408,549.23 : x
  2. Step 2: Convert to fraction form
    618,960.50/928,440.76 = 408,549.23/x
  3. Step 3: Cross multiply
    618,960.50x = 928,440.76 × 408,549.23
  4. Step 4: Simplify right side
    618,960.50x = 379,313,757,598.62
  5. Step 5: Solve for x
    x = 379,313,757,598.62/618,960.50
  6. Step 6: Final answer
    x = 612,823.85

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Half scale
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Double scale
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Similar ratio
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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.