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Finding the Fourth Proportional to 668,912.76, 923,099.60 and 400,640.76

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Solution

The fourth proportional to 668,912.76, 923,099.60 and 400,640.76 is: 552,884.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,912.76 : 923,099.60 = 400,640.76 : x
  2. Step 2: Convert to fraction form
    668,912.76/923,099.60 = 400,640.76/x
  3. Step 3: Cross multiply
    668,912.76x = 923,099.60 × 400,640.76
  4. Step 4: Simplify right side
    668,912.76x = 369,831,325,299.70
  5. Step 5: Solve for x
    x = 369,831,325,299.70/668,912.76
  6. Step 6: Final answer
    x = 552,884.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.