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Finding the Fourth Proportional to 485,704.91, 728,116.31 and 169,989.59

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Solution

The fourth proportional to 485,704.91, 728,116.31 and 169,989.59 is: 254,830.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,704.91 : 728,116.31 = 169,989.59 : x
  2. Step 2: Convert to fraction form
    485,704.91/728,116.31 = 169,989.59/x
  3. Step 3: Cross multiply
    485,704.91x = 728,116.31 × 169,989.59
  4. Step 4: Simplify right side
    485,704.91x = 123,772,188,518.68
  5. Step 5: Solve for x
    x = 123,772,188,518.68/485,704.91
  6. Step 6: Final answer
    x = 254,830.02

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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.