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Finding the Fourth Proportional to 3,989,864.40, 5,978,230.20 and 2,304,027.60

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Solution

The fourth proportional to 3,989,864.40, 5,978,230.20 and 2,304,027.60 is: 3,452,249.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989,864.40 : 5,978,230.20 = 2,304,027.60 : x
  2. Step 2: Convert to fraction form
    3,989,864.40/5,978,230.20 = 2,304,027.60/x
  3. Step 3: Cross multiply
    3,989,864.40x = 5,978,230.20 × 2,304,027.60
  4. Step 4: Simplify right side
    3,989,864.40x = 13,774,007,379,953.52
  5. Step 5: Solve for x
    x = 13,774,007,379,953.52/3,989,864.40
  6. Step 6: Final answer
    x = 3,452,249.50

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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.