Home / 2,886.34-3,981.26-1,990.12

Finding the Fourth Proportional to 2,886.34, 3,981.26 and 1,990.12

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Solution

The fourth proportional to 2,886.34, 3,981.26 and 1,990.12 is: 2,745.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.34 : 3,981.26 = 1,990.12 : x
  2. Step 2: Convert to fraction form
    2,886.34/3,981.26 = 1,990.12/x
  3. Step 3: Cross multiply
    2,886.34x = 3,981.26 × 1,990.12
  4. Step 4: Simplify right side
    2,886.34x = 7,923,185.77
  5. Step 5: Solve for x
    x = 7,923,185.77/2,886.34
  6. Step 6: Final answer
    x = 2,745.06

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.