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Finding the Fourth Proportional to 330,539.86, 455,989.44 and 239,696.56

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Solution

The fourth proportional to 330,539.86, 455,989.44 and 239,696.56 is: 330,668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,539.86 : 455,989.44 = 239,696.56 : x
  2. Step 2: Convert to fraction form
    330,539.86/455,989.44 = 239,696.56/x
  3. Step 3: Cross multiply
    330,539.86x = 455,989.44 × 239,696.56
  4. Step 4: Simplify right side
    330,539.86x = 109,299,100,164.33
  5. Step 5: Solve for x
    x = 109,299,100,164.33/330,539.86
  6. Step 6: Final answer
    x = 330,668.44

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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.