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Finding the Fourth Proportional to 255,630.20, 383,441.70 and 115,388.60

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Solution

The fourth proportional to 255,630.20, 383,441.70 and 115,388.60 is: 173,081.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,630.20 : 383,441.70 = 115,388.60 : x
  2. Step 2: Convert to fraction form
    255,630.20/383,441.70 = 115,388.60/x
  3. Step 3: Cross multiply
    255,630.20x = 383,441.70 × 115,388.60
  4. Step 4: Simplify right side
    255,630.20x = 44,244,800,944.62
  5. Step 5: Solve for x
    x = 44,244,800,944.62/255,630.20
  6. Step 6: Final answer
    x = 173,081.28

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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.