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Finding the Fourth Proportional to 485,704.41, 728,115.55 and 169,989.09

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Solution

The fourth proportional to 485,704.41, 728,115.55 and 169,989.09 is: 254,829.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,704.41 : 728,115.55 = 169,989.09 : x
  2. Step 2: Convert to fraction form
    485,704.41/728,115.55 = 169,989.09/x
  3. Step 3: Cross multiply
    485,704.41x = 728,115.55 × 169,989.09
  4. Step 4: Simplify right side
    485,704.41x = 123,771,699,759.35
  5. Step 5: Solve for x
    x = 123,771,699,759.35/485,704.41
  6. Step 6: Final answer
    x = 254,829.27

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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.