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Finding the Fourth Proportional to 2,978,259.20, 4,467,388.80 and 2,679,660.80

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Solution

The fourth proportional to 2,978,259.20, 4,467,388.80 and 2,679,660.80 is: 4,019,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,259.20 : 4,467,388.80 = 2,679,660.80 : x
  2. Step 2: Convert to fraction form
    2,978,259.20/4,467,388.80 = 2,679,660.80/x
  3. Step 3: Cross multiply
    2,978,259.20x = 4,467,388.80 × 2,679,660.80
  4. Step 4: Simplify right side
    2,978,259.20x = 11,971,086,645,719.04
  5. Step 5: Solve for x
    x = 11,971,086,645,719.04/2,978,259.20
  6. Step 6: Final answer
    x = 4,019,491.20

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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.