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Finding the Fourth Proportional to 5,679.87, 7,838.62 and 3,290.64

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Solution

The fourth proportional to 5,679.87, 7,838.62 and 3,290.64 is: 4,541.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.87 : 7,838.62 = 3,290.64 : x
  2. Step 2: Convert to fraction form
    5,679.87/7,838.62 = 3,290.64/x
  3. Step 3: Cross multiply
    5,679.87x = 7,838.62 × 3,290.64
  4. Step 4: Simplify right side
    5,679.87x = 25,794,101.50
  5. Step 5: Solve for x
    x = 25,794,101.50/5,679.87
  6. Step 6: Final answer
    x = 4,541.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.