Home / 1,912.01-2,636.15-1,247.81

Finding the Fourth Proportional to 1,912.01, 2,636.15 and 1,247.81

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Solution

The fourth proportional to 1,912.01, 2,636.15 and 1,247.81 is: 1,720.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.01 : 2,636.15 = 1,247.81 : x
  2. Step 2: Convert to fraction form
    1,912.01/2,636.15 = 1,247.81/x
  3. Step 3: Cross multiply
    1,912.01x = 2,636.15 × 1,247.81
  4. Step 4: Simplify right side
    1,912.01x = 3,289,394.91
  5. Step 5: Solve for x
    x = 3,289,394.91/1,912.01
  6. Step 6: Final answer
    x = 1,720.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.