Home / 5,185.68-7,778.82-1,290.12

Finding the Fourth Proportional to 5,185.68, 7,778.82 and 1,290.12

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Solution

The fourth proportional to 5,185.68, 7,778.82 and 1,290.12 is: 1,935.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.68 : 7,778.82 = 1,290.12 : x
  2. Step 2: Convert to fraction form
    5,185.68/7,778.82 = 1,290.12/x
  3. Step 3: Cross multiply
    5,185.68x = 7,778.82 × 1,290.12
  4. Step 4: Simplify right side
    5,185.68x = 10,035,611.26
  5. Step 5: Solve for x
    x = 10,035,611.26/5,185.68
  6. Step 6: Final answer
    x = 1,935.25

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Double scale
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Similar ratio
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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.