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Finding the Fourth Proportional to 678,606.70, 1,017,910.05 and 620,545.90

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Solution

The fourth proportional to 678,606.70, 1,017,910.05 and 620,545.90 is: 930,818.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,606.70 : 1,017,910.05 = 620,545.90 : x
  2. Step 2: Convert to fraction form
    678,606.70/1,017,910.05 = 620,545.90/x
  3. Step 3: Cross multiply
    678,606.70x = 1,017,910.05 × 620,545.90
  4. Step 4: Simplify right side
    678,606.70x = 631,659,908,096.30
  5. Step 5: Solve for x
    x = 631,659,908,096.30/678,606.70
  6. Step 6: Final answer
    x = 930,818.85

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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.