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Finding the Fourth Proportional to 2,188.62, 3,282.85 and 955.75

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Solution

The fourth proportional to 2,188.62, 3,282.85 and 955.75 is: 1,433.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.62 : 3,282.85 = 955.75 : x
  2. Step 2: Convert to fraction form
    2,188.62/3,282.85 = 955.75/x
  3. Step 3: Cross multiply
    2,188.62x = 3,282.85 × 955.75
  4. Step 4: Simplify right side
    2,188.62x = 3,137,585.72
  5. Step 5: Solve for x
    x = 3,137,585.72/2,188.62
  6. Step 6: Final answer
    x = 1,433.59

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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.