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Finding the Fourth Proportional to 2,618, 3,928.01 and 886.62

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Solution

The fourth proportional to 2,618, 3,928.01 and 886.62 is: 1,330.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618 : 3,928.01 = 886.62 : x
  2. Step 2: Convert to fraction form
    2,618/3,928.01 = 886.62/x
  3. Step 3: Cross multiply
    2,618x = 3,928.01 × 886.62
  4. Step 4: Simplify right side
    2,618x = 3,482,652.23
  5. Step 5: Solve for x
    x = 3,482,652.23/2,618
  6. Step 6: Final answer
    x = 1,330.27

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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.