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Finding the Fourth Proportional to 3,998,906.40, 5,989,028.40 and 3,918,727.20

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Solution

The fourth proportional to 3,998,906.40, 5,989,028.40 and 3,918,727.20 is: 5,868,946.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998,906.40 : 5,989,028.40 = 3,918,727.20 : x
  2. Step 2: Convert to fraction form
    3,998,906.40/5,989,028.40 = 3,918,727.20/x
  3. Step 3: Cross multiply
    3,998,906.40x = 5,989,028.40 × 3,918,727.20
  4. Step 4: Simplify right side
    3,998,906.40x = 23,469,368,492,652.48
  5. Step 5: Solve for x
    x = 23,469,368,492,652.48/3,998,906.40
  6. Step 6: Final answer
    x = 5,868,946.69

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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.