Home / 491,315.05-678,010.38-276,450.82

Finding the Fourth Proportional to 491,315.05, 678,010.38 and 276,450.82

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Solution

The fourth proportional to 491,315.05, 678,010.38 and 276,450.82 is: 381,499.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,315.05 : 678,010.38 = 276,450.82 : x
  2. Step 2: Convert to fraction form
    491,315.05/678,010.38 = 276,450.82/x
  3. Step 3: Cross multiply
    491,315.05x = 678,010.38 × 276,450.82
  4. Step 4: Simplify right side
    491,315.05x = 187,436,525,519.51
  5. Step 5: Solve for x
    x = 187,436,525,519.51/491,315.05
  6. Step 6: Final answer
    x = 381,499.66

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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.