Home / 1,278.56-1,918.59-1,197.57

Finding the Fourth Proportional to 1,278.56, 1,918.59 and 1,197.57

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Solution

The fourth proportional to 1,278.56, 1,918.59 and 1,197.57 is: 1,797.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.56 : 1,918.59 = 1,197.57 : x
  2. Step 2: Convert to fraction form
    1,278.56/1,918.59 = 1,197.57/x
  3. Step 3: Cross multiply
    1,278.56x = 1,918.59 × 1,197.57
  4. Step 4: Simplify right side
    1,278.56x = 2,297,645.83
  5. Step 5: Solve for x
    x = 2,297,645.83/1,278.56
  6. Step 6: Final answer
    x = 1,797.06

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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.