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Finding the Fourth Proportional to 2,345.53, 3,517.83 and 679.85

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Solution

The fourth proportional to 2,345.53, 3,517.83 and 679.85 is: 1,019.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.53 : 3,517.83 = 679.85 : x
  2. Step 2: Convert to fraction form
    2,345.53/3,517.83 = 679.85/x
  3. Step 3: Cross multiply
    2,345.53x = 3,517.83 × 679.85
  4. Step 4: Simplify right side
    2,345.53x = 2,391,596.73
  5. Step 5: Solve for x
    x = 2,391,596.73/2,345.53
  6. Step 6: Final answer
    x = 1,019.64

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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.