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Finding the Fourth Proportional to 2,099.09, 3,148.41 and 638.25

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Solution

The fourth proportional to 2,099.09, 3,148.41 and 638.25 is: 957.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.09 : 3,148.41 = 638.25 : x
  2. Step 2: Convert to fraction form
    2,099.09/3,148.41 = 638.25/x
  3. Step 3: Cross multiply
    2,099.09x = 3,148.41 × 638.25
  4. Step 4: Simplify right side
    2,099.09x = 2,009,472.68
  5. Step 5: Solve for x
    x = 2,009,472.68/2,099.09
  6. Step 6: Final answer
    x = 957.31

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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.