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Finding the Fourth Proportional to 485,213.60, 727,561.20 and 169,680.80

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Solution

The fourth proportional to 485,213.60, 727,561.20 and 169,680.80 is: 254,430.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,213.60 : 727,561.20 = 169,680.80 : x
  2. Step 2: Convert to fraction form
    485,213.60/727,561.20 = 169,680.80/x
  3. Step 3: Cross multiply
    485,213.60x = 727,561.20 × 169,680.80
  4. Step 4: Simplify right side
    485,213.60x = 123,453,166,464.96
  5. Step 5: Solve for x
    x = 123,453,166,464.96/485,213.60
  6. Step 6: Final answer
    x = 254,430.56

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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.