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Finding the Fourth Proportional to 331,019.76, 495,878.33 and 218,355.78

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Solution

The fourth proportional to 331,019.76, 495,878.33 and 218,355.78 is: 327,104.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,019.76 : 495,878.33 = 218,355.78 : x
  2. Step 2: Convert to fraction form
    331,019.76/495,878.33 = 218,355.78/x
  3. Step 3: Cross multiply
    331,019.76x = 495,878.33 × 218,355.78
  4. Step 4: Simplify right side
    331,019.76x = 108,277,897,139.58
  5. Step 5: Solve for x
    x = 108,277,897,139.58/331,019.76
  6. Step 6: Final answer
    x = 327,104.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.