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Finding the Fourth Proportional to 325,640.20, 488,978.70 and 220,923.40

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Solution

The fourth proportional to 325,640.20, 488,978.70 and 220,923.40 is: 331,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,640.20 : 488,978.70 = 220,923.40 : x
  2. Step 2: Convert to fraction form
    325,640.20/488,978.70 = 220,923.40/x
  3. Step 3: Cross multiply
    325,640.20x = 488,978.70 × 220,923.40
  4. Step 4: Simplify right side
    325,640.20x = 108,026,836,931.58
  5. Step 5: Solve for x
    x = 108,026,836,931.58/325,640.20
  6. Step 6: Final answer
    x = 331,736.80

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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.