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Finding the Fourth Proportional to 2,099.70, 3,150.09 and 638.73

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Solution

The fourth proportional to 2,099.70, 3,150.09 and 638.73 is: 958.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.70 : 3,150.09 = 638.73 : x
  2. Step 2: Convert to fraction form
    2,099.70/3,150.09 = 638.73/x
  3. Step 3: Cross multiply
    2,099.70x = 3,150.09 × 638.73
  4. Step 4: Simplify right side
    2,099.70x = 2,012,056.99
  5. Step 5: Solve for x
    x = 2,012,056.99/2,099.70
  6. Step 6: Final answer
    x = 958.26

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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.