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Finding the Fourth Proportional to 681,679.12, 940,736.40 and 379,892.56

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Solution

The fourth proportional to 681,679.12, 940,736.40 and 379,892.56 is: 524,262.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,679.12 : 940,736.40 = 379,892.56 : x
  2. Step 2: Convert to fraction form
    681,679.12/940,736.40 = 379,892.56/x
  3. Step 3: Cross multiply
    681,679.12x = 940,736.40 × 379,892.56
  4. Step 4: Simplify right side
    681,679.12x = 357,378,759,281.18
  5. Step 5: Solve for x
    x = 357,378,759,281.18/681,679.12
  6. Step 6: Final answer
    x = 524,262.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.