Home / 3,107,420.80-4,661,131.20-978,157.60

Finding the Fourth Proportional to 3,107,420.80, 4,661,131.20 and 978,157.60

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Solution

The fourth proportional to 3,107,420.80, 4,661,131.20 and 978,157.60 is: 1,467,236.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107,420.80 : 4,661,131.20 = 978,157.60 : x
  2. Step 2: Convert to fraction form
    3,107,420.80/4,661,131.20 = 978,157.60/x
  3. Step 3: Cross multiply
    3,107,420.80x = 4,661,131.20 × 978,157.60
  4. Step 4: Simplify right side
    3,107,420.80x = 4,559,320,907,877.12
  5. Step 5: Solve for x
    x = 4,559,320,907,877.12/3,107,420.80
  6. Step 6: Final answer
    x = 1,467,236.40

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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.