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Finding the Fourth Proportional to 325,837.91, 488,755.89 and 82,678.51

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Solution

The fourth proportional to 325,837.91, 488,755.89 and 82,678.51 is: 124,017.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,837.91 : 488,755.89 = 82,678.51 : x
  2. Step 2: Convert to fraction form
    325,837.91/488,755.89 = 82,678.51/x
  3. Step 3: Cross multiply
    325,837.91x = 488,755.89 × 82,678.51
  4. Step 4: Simplify right side
    325,837.91x = 40,409,607,517.03
  5. Step 5: Solve for x
    x = 40,409,607,517.03/325,837.91
  6. Step 6: Final answer
    x = 124,017.51

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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.