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Finding the Fourth Proportional to 2,978,987.60, 4,464,982.20 and 1,378,169.21

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Solution

The fourth proportional to 2,978,987.60, 4,464,982.20 and 1,378,169.21 is: 2,065,634.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,987.60 : 4,464,982.20 = 1,378,169.21 : x
  2. Step 2: Convert to fraction form
    2,978,987.60/4,464,982.20 = 1,378,169.21/x
  3. Step 3: Cross multiply
    2,978,987.60x = 4,464,982.20 × 1,378,169.21
  4. Step 4: Simplify right side
    2,978,987.60x = 6,153,500,991,238.06
  5. Step 5: Solve for x
    x = 6,153,500,991,238.06/2,978,987.60
  6. Step 6: Final answer
    x = 2,065,634.98

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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.