Home / 2,099.18-3,149.22-638.45

Finding the Fourth Proportional to 2,099.18, 3,149.22 and 638.45

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Solution

The fourth proportional to 2,099.18, 3,149.22 and 638.45 is: 957.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.18 : 3,149.22 = 638.45 : x
  2. Step 2: Convert to fraction form
    2,099.18/3,149.22 = 638.45/x
  3. Step 3: Cross multiply
    2,099.18x = 3,149.22 × 638.45
  4. Step 4: Simplify right side
    2,099.18x = 2,010,600.57
  5. Step 5: Solve for x
    x = 2,010,600.57/2,099.18
  6. Step 6: Final answer
    x = 957.81

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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.