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Finding the Fourth Proportional to 325,830.20, 488,769.60 and 115,440.80

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Solution

The fourth proportional to 325,830.20, 488,769.60 and 115,440.80 is: 173,169.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,830.20 : 488,769.60 = 115,440.80 : x
  2. Step 2: Convert to fraction form
    325,830.20/488,769.60 = 115,440.80/x
  3. Step 3: Cross multiply
    325,830.20x = 488,769.60 × 115,440.80
  4. Step 4: Simplify right side
    325,830.20x = 56,423,953,639.68
  5. Step 5: Solve for x
    x = 56,423,953,639.68/325,830.20
  6. Step 6: Final answer
    x = 173,169.81

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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.