Home / 2,814.39-3,883.79-1,555.40

Finding the Fourth Proportional to 2,814.39, 3,883.79 and 1,555.40

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Solution

The fourth proportional to 2,814.39, 3,883.79 and 1,555.40 is: 2,146.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.39 : 3,883.79 = 1,555.40 : x
  2. Step 2: Convert to fraction form
    2,814.39/3,883.79 = 1,555.40/x
  3. Step 3: Cross multiply
    2,814.39x = 3,883.79 × 1,555.40
  4. Step 4: Simplify right side
    2,814.39x = 6,040,860.56
  5. Step 5: Solve for x
    x = 6,040,860.56/2,814.39
  6. Step 6: Final answer
    x = 2,146.42

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1.5x scale

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.