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Finding the Fourth Proportional to 491,912.95, 678,764.96 and 277,039.39

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Solution

The fourth proportional to 491,912.95, 678,764.96 and 277,039.39 is: 382,272.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,912.95 : 678,764.96 = 277,039.39 : x
  2. Step 2: Convert to fraction form
    491,912.95/678,764.96 = 277,039.39/x
  3. Step 3: Cross multiply
    491,912.95x = 678,764.96 × 277,039.39
  4. Step 4: Simplify right side
    491,912.95x = 188,044,628,428.56
  5. Step 5: Solve for x
    x = 188,044,628,428.56/491,912.95
  6. Step 6: Final answer
    x = 382,272.17

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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.