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Finding the Fourth Proportional to 2,639.90, 3,958.54 and 884.30

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Solution

The fourth proportional to 2,639.90, 3,958.54 and 884.30 is: 1,326.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.90 : 3,958.54 = 884.30 : x
  2. Step 2: Convert to fraction form
    2,639.90/3,958.54 = 884.30/x
  3. Step 3: Cross multiply
    2,639.90x = 3,958.54 × 884.30
  4. Step 4: Simplify right side
    2,639.90x = 3,500,514.92
  5. Step 5: Solve for x
    x = 3,500,514.92/2,639.90
  6. Step 6: Final answer
    x = 1,326.00

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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.