Home / 1,392,832.78-2,089,249.86-919,407.49

Finding the Fourth Proportional to 1,392,832.78, 2,089,249.86 and 919,407.49

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Solution

The fourth proportional to 1,392,832.78, 2,089,249.86 and 919,407.49 is: 1,379,111.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,832.78 : 2,089,249.86 = 919,407.49 : x
  2. Step 2: Convert to fraction form
    1,392,832.78/2,089,249.86 = 919,407.49/x
  3. Step 3: Cross multiply
    1,392,832.78x = 2,089,249.86 × 919,407.49
  4. Step 4: Simplify right side
    1,392,832.78x = 1,920,871,969,765.45
  5. Step 5: Solve for x
    x = 1,920,871,969,765.45/1,392,832.78
  6. Step 6: Final answer
    x = 1,379,111.69

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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.