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Finding the Fourth Proportional to 4,886.65, 6,742.87 and 2,790.64

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Solution

The fourth proportional to 4,886.65, 6,742.87 and 2,790.64 is: 3,850.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,886.65 : 6,742.87 = 2,790.64 : x
  2. Step 2: Convert to fraction form
    4,886.65/6,742.87 = 2,790.64/x
  3. Step 3: Cross multiply
    4,886.65x = 6,742.87 × 2,790.64
  4. Step 4: Simplify right side
    4,886.65x = 18,816,922.74
  5. Step 5: Solve for x
    x = 18,816,922.74/4,886.65
  6. Step 6: Final answer
    x = 3,850.68

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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.