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Finding the Fourth Proportional to 325,640.80, 488,518.80 and 115,400.80

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Solution

The fourth proportional to 325,640.80, 488,518.80 and 115,400.80 is: 173,121.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,640.80 : 488,518.80 = 115,400.80 : x
  2. Step 2: Convert to fraction form
    325,640.80/488,518.80 = 115,400.80/x
  3. Step 3: Cross multiply
    325,640.80x = 488,518.80 × 115,400.80
  4. Step 4: Simplify right side
    325,640.80x = 56,375,460,335.04
  5. Step 5: Solve for x
    x = 56,375,460,335.04/325,640.80
  6. Step 6: Final answer
    x = 173,121.61

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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.