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Finding the Fourth Proportional to 485,314.12, 728,074.86 and 169,781.32

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Solution

The fourth proportional to 485,314.12, 728,074.86 and 169,781.32 is: 254,708.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,314.12 : 728,074.86 = 169,781.32 : x
  2. Step 2: Convert to fraction form
    485,314.12/728,074.86 = 169,781.32/x
  3. Step 3: Cross multiply
    485,314.12x = 728,074.86 × 169,781.32
  4. Step 4: Simplify right side
    485,314.12x = 123,613,510,789.62
  5. Step 5: Solve for x
    x = 123,613,510,789.62/485,314.12
  6. Step 6: Final answer
    x = 254,708.25

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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.