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Finding the Fourth Proportional to 325,120.60, 487,616.10 and 156,640.60

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Solution

The fourth proportional to 325,120.60, 487,616.10 and 156,640.60 is: 234,929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,120.60 : 487,616.10 = 156,640.60 : x
  2. Step 2: Convert to fraction form
    325,120.60/487,616.10 = 156,640.60/x
  3. Step 3: Cross multiply
    325,120.60x = 487,616.10 × 156,640.60
  4. Step 4: Simplify right side
    325,120.60x = 76,380,478,473.66
  5. Step 5: Solve for x
    x = 76,380,478,473.66/325,120.60
  6. Step 6: Final answer
    x = 234,929.68

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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.