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Finding the Fourth Proportional to 6,603,998.80, 9,905,998.20 and 5,109,163.60

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Solution

The fourth proportional to 6,603,998.80, 9,905,998.20 and 5,109,163.60 is: 7,663,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,603,998.80 : 9,905,998.20 = 5,109,163.60 : x
  2. Step 2: Convert to fraction form
    6,603,998.80/9,905,998.20 = 5,109,163.60/x
  3. Step 3: Cross multiply
    6,603,998.80x = 9,905,998.20 × 5,109,163.60
  4. Step 4: Simplify right side
    6,603,998.80x = 50,611,365,425,105.52
  5. Step 5: Solve for x
    x = 50,611,365,425,105.52/6,603,998.80
  6. Step 6: Final answer
    x = 7,663,745.40

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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.