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Finding the Fourth Proportional to 2,181.40, 3,274.56 and 883.78

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Solution

The fourth proportional to 2,181.40, 3,274.56 and 883.78 is: 1,326.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.40 : 3,274.56 = 883.78 : x
  2. Step 2: Convert to fraction form
    2,181.40/3,274.56 = 883.78/x
  3. Step 3: Cross multiply
    2,181.40x = 3,274.56 × 883.78
  4. Step 4: Simplify right side
    2,181.40x = 2,893,990.64
  5. Step 5: Solve for x
    x = 2,893,990.64/2,181.40
  6. Step 6: Final answer
    x = 1,326.67

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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.