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Finding the Fourth Proportional to 3,978,370.80, 5,953,559.40 and 3,642,447.60

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Solution

The fourth proportional to 3,978,370.80, 5,953,559.40 and 3,642,447.60 is: 5,450,856.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978,370.80 : 5,953,559.40 = 3,642,447.60 : x
  2. Step 2: Convert to fraction form
    3,978,370.80/5,953,559.40 = 3,642,447.60/x
  3. Step 3: Cross multiply
    3,978,370.80x = 5,953,559.40 × 3,642,447.60
  4. Step 4: Simplify right side
    3,978,370.80x = 21,685,528,147,987.44
  5. Step 5: Solve for x
    x = 21,685,528,147,987.44/3,978,370.80
  6. Step 6: Final answer
    x = 5,450,856.45

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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.