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Finding the Fourth Proportional to 331,013.39, 455,928.33 and 254,385.86

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Solution

The fourth proportional to 331,013.39, 455,928.33 and 254,385.86 is: 350,383.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,013.39 : 455,928.33 = 254,385.86 : x
  2. Step 2: Convert to fraction form
    331,013.39/455,928.33 = 254,385.86/x
  3. Step 3: Cross multiply
    331,013.39x = 455,928.33 × 254,385.86
  4. Step 4: Simplify right side
    331,013.39x = 115,981,720,886.01
  5. Step 5: Solve for x
    x = 115,981,720,886.01/331,013.39
  6. Step 6: Final answer
    x = 350,383.78

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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.