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Finding the Fourth Proportional to 491,868.56, 678,760.68 and 274,065.98

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Solution

The fourth proportional to 491,868.56, 678,760.68 and 274,065.98 is: 378,201.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,868.56 : 678,760.68 = 274,065.98 : x
  2. Step 2: Convert to fraction form
    491,868.56/678,760.68 = 274,065.98/x
  3. Step 3: Cross multiply
    491,868.56x = 678,760.68 × 274,065.98
  4. Step 4: Simplify right side
    491,868.56x = 186,025,207,555.86
  5. Step 5: Solve for x
    x = 186,025,207,555.86/491,868.56
  6. Step 6: Final answer
    x = 378,201.06

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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.