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Finding the Fourth Proportional to 2,245.73, 3,368.52 and 685.67

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Solution

The fourth proportional to 2,245.73, 3,368.52 and 685.67 is: 1,028.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,245.73 : 3,368.52 = 685.67 : x
  2. Step 2: Convert to fraction form
    2,245.73/3,368.52 = 685.67/x
  3. Step 3: Cross multiply
    2,245.73x = 3,368.52 × 685.67
  4. Step 4: Simplify right side
    2,245.73x = 2,309,676.27
  5. Step 5: Solve for x
    x = 2,309,676.27/2,245.73
  6. Step 6: Final answer
    x = 1,028.48

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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.