Home / 305,399.20-421,451.25-178,099.39

Finding the Fourth Proportional to 305,399.20, 421,451.25 and 178,099.39

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Solution

The fourth proportional to 305,399.20, 421,451.25 and 178,099.39 is: 245,777.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,399.20 : 421,451.25 = 178,099.39 : x
  2. Step 2: Convert to fraction form
    305,399.20/421,451.25 = 178,099.39/x
  3. Step 3: Cross multiply
    305,399.20x = 421,451.25 × 178,099.39
  4. Step 4: Simplify right side
    305,399.20x = 75,060,209,649.24
  5. Step 5: Solve for x
    x = 75,060,209,649.24/305,399.20
  6. Step 6: Final answer
    x = 245,777.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.