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Finding the Fourth Proportional to 3,978,007.20, 5,967,010.80 and 1,455,472.80

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Solution

The fourth proportional to 3,978,007.20, 5,967,010.80 and 1,455,472.80 is: 2,183,209.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978,007.20 : 5,967,010.80 = 1,455,472.80 : x
  2. Step 2: Convert to fraction form
    3,978,007.20/5,967,010.80 = 1,455,472.80/x
  3. Step 3: Cross multiply
    3,978,007.20x = 5,967,010.80 × 1,455,472.80
  4. Step 4: Simplify right side
    3,978,007.20x = 8,684,821,916,706.24
  5. Step 5: Solve for x
    x = 8,684,821,916,706.24/3,978,007.20
  6. Step 6: Final answer
    x = 2,183,209.20

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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.