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Finding the Fourth Proportional to 325,639.20, 488,977.20 and 220,922.40

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Solution

The fourth proportional to 325,639.20, 488,977.20 and 220,922.40 is: 331,735.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,639.20 : 488,977.20 = 220,922.40 : x
  2. Step 2: Convert to fraction form
    325,639.20/488,977.20 = 220,922.40/x
  3. Step 3: Cross multiply
    325,639.20x = 488,977.20 × 220,922.40
  4. Step 4: Simplify right side
    325,639.20x = 108,026,016,569.28
  5. Step 5: Solve for x
    x = 108,026,016,569.28/325,639.20
  6. Step 6: Final answer
    x = 331,735.30

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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.