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Finding the Fourth Proportional to 485,707.91, 728,120.81 and 169,992.59

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Solution

The fourth proportional to 485,707.91, 728,120.81 and 169,992.59 is: 254,834.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,707.91 : 728,120.81 = 169,992.59 : x
  2. Step 2: Convert to fraction form
    485,707.91/728,120.81 = 169,992.59/x
  3. Step 3: Cross multiply
    485,707.91x = 728,120.81 × 169,992.59
  4. Step 4: Simplify right side
    485,707.91x = 123,775,137,834.23
  5. Step 5: Solve for x
    x = 123,775,137,834.23/485,707.91
  6. Step 6: Final answer
    x = 254,834.51

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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.