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Finding the Fourth Proportional to 5,458.80, 8,185.80 and 2,170.80

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Solution

The fourth proportional to 5,458.80, 8,185.80 and 2,170.80 is: 3,255.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,458.80 : 8,185.80 = 2,170.80 : x
  2. Step 2: Convert to fraction form
    5,458.80/8,185.80 = 2,170.80/x
  3. Step 3: Cross multiply
    5,458.80x = 8,185.80 × 2,170.80
  4. Step 4: Simplify right side
    5,458.80x = 17,769,734.64
  5. Step 5: Solve for x
    x = 17,769,734.64/5,458.80
  6. Step 6: Final answer
    x = 3,255.25

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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.