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Finding the Fourth Proportional to 2,394.30, 3,591.16 and 639.43

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Solution

The fourth proportional to 2,394.30, 3,591.16 and 639.43 is: 959.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,394.30 : 3,591.16 = 639.43 : x
  2. Step 2: Convert to fraction form
    2,394.30/3,591.16 = 639.43/x
  3. Step 3: Cross multiply
    2,394.30x = 3,591.16 × 639.43
  4. Step 4: Simplify right side
    2,394.30x = 2,296,295.44
  5. Step 5: Solve for x
    x = 2,296,295.44/2,394.30
  6. Step 6: Final answer
    x = 959.07

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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.