Home / 421,059.20-580,997.28-239,778.56

Finding the Fourth Proportional to 421,059.20, 580,997.28 and 239,778.56

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Solution

The fourth proportional to 421,059.20, 580,997.28 and 239,778.56 is: 330,857.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,059.20 : 580,997.28 = 239,778.56 : x
  2. Step 2: Convert to fraction form
    421,059.20/580,997.28 = 239,778.56/x
  3. Step 3: Cross multiply
    421,059.20x = 580,997.28 × 239,778.56
  4. Step 4: Simplify right side
    421,059.20x = 139,310,691,162.32
  5. Step 5: Solve for x
    x = 139,310,691,162.32/421,059.20
  6. Step 6: Final answer
    x = 330,857.73

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1.5x scale

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.