Home / 1,987,441.52-2,980,744.31-639,724.64

Finding the Fourth Proportional to 1,987,441.52, 2,980,744.31 and 639,724.64

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Solution

The fourth proportional to 1,987,441.52, 2,980,744.31 and 639,724.64 is: 959,452.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,441.52 : 2,980,744.31 = 639,724.64 : x
  2. Step 2: Convert to fraction form
    1,987,441.52/2,980,744.31 = 639,724.64/x
  3. Step 3: Cross multiply
    1,987,441.52x = 2,980,744.31 × 639,724.64
  4. Step 4: Simplify right side
    1,987,441.52x = 1,906,855,562,544.45
  5. Step 5: Solve for x
    x = 1,906,855,562,544.45/1,987,441.52
  6. Step 6: Final answer
    x = 959,452.42

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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.