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Finding the Fourth Proportional to 3,980,563.20, 5,970,844.80 and 988,747.20

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Solution

The fourth proportional to 3,980,563.20, 5,970,844.80 and 988,747.20 is: 1,483,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980,563.20 : 5,970,844.80 = 988,747.20 : x
  2. Step 2: Convert to fraction form
    3,980,563.20/5,970,844.80 = 988,747.20/x
  3. Step 3: Cross multiply
    3,980,563.20x = 5,970,844.80 × 988,747.20
  4. Step 4: Simplify right side
    3,980,563.20x = 5,903,656,077,634.56
  5. Step 5: Solve for x
    x = 5,903,656,077,634.56/3,980,563.20
  6. Step 6: Final answer
    x = 1,483,120.80

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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.