Home / 1,286.45-1,918.37-1,274.75

Finding the Fourth Proportional to 1,286.45, 1,918.37 and 1,274.75

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Solution

The fourth proportional to 1,286.45, 1,918.37 and 1,274.75 is: 1,900.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.45 : 1,918.37 = 1,274.75 : x
  2. Step 2: Convert to fraction form
    1,286.45/1,918.37 = 1,274.75/x
  3. Step 3: Cross multiply
    1,286.45x = 1,918.37 × 1,274.75
  4. Step 4: Simplify right side
    1,286.45x = 2,445,450.14
  5. Step 5: Solve for x
    x = 2,445,450.14/1,286.45
  6. Step 6: Final answer
    x = 1,900.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.