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Finding the Fourth Proportional to 325,820.20, 488,754.60 and 115,430.80

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Solution

The fourth proportional to 325,820.20, 488,754.60 and 115,430.80 is: 173,154.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,820.20 : 488,754.60 = 115,430.80 : x
  2. Step 2: Convert to fraction form
    325,820.20/488,754.60 = 115,430.80/x
  3. Step 3: Cross multiply
    325,820.20x = 488,754.60 × 115,430.80
  4. Step 4: Simplify right side
    325,820.20x = 56,417,334,481.68
  5. Step 5: Solve for x
    x = 56,417,334,481.68/325,820.20
  6. Step 6: Final answer
    x = 173,154.81

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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.