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Finding the Fourth Proportional to 5,185.94, 7,778.94 and 1,290.35

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Solution

The fourth proportional to 5,185.94, 7,778.94 and 1,290.35 is: 1,935.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.94 : 7,778.94 = 1,290.35 : x
  2. Step 2: Convert to fraction form
    5,185.94/7,778.94 = 1,290.35/x
  3. Step 3: Cross multiply
    5,185.94x = 7,778.94 × 1,290.35
  4. Step 4: Simplify right side
    5,185.94x = 10,037,574.68
  5. Step 5: Solve for x
    x = 10,037,574.68/5,185.94
  6. Step 6: Final answer
    x = 1,935.54

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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.