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Finding the Fourth Proportional to 3,379.70, 5,071.98 and 1,992.17

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Solution

The fourth proportional to 3,379.70, 5,071.98 and 1,992.17 is: 2,989.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,379.70 : 5,071.98 = 1,992.17 : x
  2. Step 2: Convert to fraction form
    3,379.70/5,071.98 = 1,992.17/x
  3. Step 3: Cross multiply
    3,379.70x = 5,071.98 × 1,992.17
  4. Step 4: Simplify right side
    3,379.70x = 10,104,246.40
  5. Step 5: Solve for x
    x = 10,104,246.40/3,379.70
  6. Step 6: Final answer
    x = 2,989.69

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1.5x scale

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.