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Finding the Fourth Proportional to 1,978,021.02, 2,968,249.77 and 779,739.42

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Solution

The fourth proportional to 1,978,021.02, 2,968,249.77 and 779,739.42 is: 1,170,089.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,021.02 : 2,968,249.77 = 779,739.42 : x
  2. Step 2: Convert to fraction form
    1,978,021.02/2,968,249.77 = 779,739.42/x
  3. Step 3: Cross multiply
    1,978,021.02x = 2,968,249.77 × 779,739.42
  4. Step 4: Simplify right side
    1,978,021.02x = 2,314,461,354,074.93
  5. Step 5: Solve for x
    x = 2,314,461,354,074.93/1,978,021.02
  6. Step 6: Final answer
    x = 1,170,089.36

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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.