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Finding the Fourth Proportional to 620,999.70, 931,499.55 and 451,725.90

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Solution

The fourth proportional to 620,999.70, 931,499.55 and 451,725.90 is: 677,588.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,999.70 : 931,499.55 = 451,725.90 : x
  2. Step 2: Convert to fraction form
    620,999.70/931,499.55 = 451,725.90/x
  3. Step 3: Cross multiply
    620,999.70x = 931,499.55 × 451,725.90
  4. Step 4: Simplify right side
    620,999.70x = 420,782,472,573.35
  5. Step 5: Solve for x
    x = 420,782,472,573.35/620,999.70
  6. Step 6: Final answer
    x = 677,588.85

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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.