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Finding the Fourth Proportional to 998,121.60, 1,494,849.60 and 978,076.80

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Solution

The fourth proportional to 998,121.60, 1,494,849.60 and 978,076.80 is: 1,464,829.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,121.60 : 1,494,849.60 = 978,076.80 : x
  2. Step 2: Convert to fraction form
    998,121.60/1,494,849.60 = 978,076.80/x
  3. Step 3: Cross multiply
    998,121.60x = 1,494,849.60 × 978,076.80
  4. Step 4: Simplify right side
    998,121.60x = 1,462,077,713,249.28
  5. Step 5: Solve for x
    x = 1,462,077,713,249.28/998,121.60
  6. Step 6: Final answer
    x = 1,464,829.25

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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.