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Finding the Fourth Proportional to 2,119.32, 3,179.40 and 658.41

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Solution

The fourth proportional to 2,119.32, 3,179.40 and 658.41 is: 987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.32 : 3,179.40 = 658.41 : x
  2. Step 2: Convert to fraction form
    2,119.32/3,179.40 = 658.41/x
  3. Step 3: Cross multiply
    2,119.32x = 3,179.40 × 658.41
  4. Step 4: Simplify right side
    2,119.32x = 2,093,348.75
  5. Step 5: Solve for x
    x = 2,093,348.75/2,119.32
  6. Step 6: Final answer
    x = 987.75

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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.