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Finding the Fourth Proportional to 1,234.56, 1,850.02 and 685.99

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Solution

The fourth proportional to 1,234.56, 1,850.02 and 685.99 is: 1,027.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.56 : 1,850.02 = 685.99 : x
  2. Step 2: Convert to fraction form
    1,234.56/1,850.02 = 685.99/x
  3. Step 3: Cross multiply
    1,234.56x = 1,850.02 × 685.99
  4. Step 4: Simplify right side
    1,234.56x = 1,269,095.82
  5. Step 5: Solve for x
    x = 1,269,095.82/1,234.56
  6. Step 6: Final answer
    x = 1,027.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.