Home / 1,286.05-1,918.97-1,207.68

Finding the Fourth Proportional to 1,286.05, 1,918.97 and 1,207.68

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Solution

The fourth proportional to 1,286.05, 1,918.97 and 1,207.68 is: 1,802.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.05 : 1,918.97 = 1,207.68 : x
  2. Step 2: Convert to fraction form
    1,286.05/1,918.97 = 1,207.68/x
  3. Step 3: Cross multiply
    1,286.05x = 1,918.97 × 1,207.68
  4. Step 4: Simplify right side
    1,286.05x = 2,317,501.69
  5. Step 5: Solve for x
    x = 2,317,501.69/1,286.05
  6. Step 6: Final answer
    x = 1,802.03

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1.5x scale

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.