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Finding the Fourth Proportional to 3,379.49, 5,069.08 and 1,039.40

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Solution

The fourth proportional to 3,379.49, 5,069.08 and 1,039.40 is: 1,559.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,379.49 : 5,069.08 = 1,039.40 : x
  2. Step 2: Convert to fraction form
    3,379.49/5,069.08 = 1,039.40/x
  3. Step 3: Cross multiply
    3,379.49x = 5,069.08 × 1,039.40
  4. Step 4: Simplify right side
    3,379.49x = 5,268,801.75
  5. Step 5: Solve for x
    x = 5,268,801.75/3,379.49
  6. Step 6: Final answer
    x = 1,559.05

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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.