Home / 420,940.80-580,919.04-239,656.32

Finding the Fourth Proportional to 420,940.80, 580,919.04 and 239,656.32

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Solution

The fourth proportional to 420,940.80, 580,919.04 and 239,656.32 is: 330,737.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,940.80 : 580,919.04 = 239,656.32 : x
  2. Step 2: Convert to fraction form
    420,940.80/580,919.04 = 239,656.32/x
  3. Step 3: Cross multiply
    420,940.80x = 580,919.04 × 239,656.32
  4. Step 4: Simplify right side
    420,940.80x = 139,220,919,344.33
  5. Step 5: Solve for x
    x = 139,220,919,344.33/420,940.80
  6. Step 6: Final answer
    x = 330,737.53

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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.