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Finding the Fourth Proportional to 2,886.51, 3,980.16 and 2,257.14

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Solution

The fourth proportional to 2,886.51, 3,980.16 and 2,257.14 is: 3,112.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.51 : 3,980.16 = 2,257.14 : x
  2. Step 2: Convert to fraction form
    2,886.51/3,980.16 = 2,257.14/x
  3. Step 3: Cross multiply
    2,886.51x = 3,980.16 × 2,257.14
  4. Step 4: Simplify right side
    2,886.51x = 8,983,778.34
  5. Step 5: Solve for x
    x = 8,983,778.34/2,886.51
  6. Step 6: Final answer
    x = 3,112.33

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Double scale
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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.