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Finding the Fourth Proportional to 485,707.12, 728,119.62 and 169,991.80

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Solution

The fourth proportional to 485,707.12, 728,119.62 and 169,991.80 is: 254,833.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,707.12 : 728,119.62 = 169,991.80 : x
  2. Step 2: Convert to fraction form
    485,707.12/728,119.62 = 169,991.80/x
  3. Step 3: Cross multiply
    485,707.12x = 728,119.62 × 169,991.80
  4. Step 4: Simplify right side
    485,707.12x = 123,774,364,819.12
  5. Step 5: Solve for x
    x = 123,774,364,819.12/485,707.12
  6. Step 6: Final answer
    x = 254,833.33

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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.