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Finding the Fourth Proportional to 494,059.36, 681,836.52 and 279,219.28

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Solution

The fourth proportional to 494,059.36, 681,836.52 and 279,219.28 is: 385,342.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,059.36 : 681,836.52 = 279,219.28 : x
  2. Step 2: Convert to fraction form
    494,059.36/681,836.52 = 279,219.28/x
  3. Step 3: Cross multiply
    494,059.36x = 681,836.52 × 279,219.28
  4. Step 4: Simplify right side
    494,059.36x = 190,381,902,192.11
  5. Step 5: Solve for x
    x = 190,381,902,192.11/494,059.36
  6. Step 6: Final answer
    x = 385,342.16

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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.