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Finding the Fourth Proportional to 3,189.89, 4,787.74 and 1,630.97

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Solution

The fourth proportional to 3,189.89, 4,787.74 and 1,630.97 is: 2,447.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.89 : 4,787.74 = 1,630.97 : x
  2. Step 2: Convert to fraction form
    3,189.89/4,787.74 = 1,630.97/x
  3. Step 3: Cross multiply
    3,189.89x = 4,787.74 × 1,630.97
  4. Step 4: Simplify right side
    3,189.89x = 7,808,660.31
  5. Step 5: Solve for x
    x = 7,808,660.31/3,189.89
  6. Step 6: Final answer
    x = 2,447.94

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1.5x scale

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.