Home / 1,958.21-2,938.05-1,178.75

Finding the Fourth Proportional to 1,958.21, 2,938.05 and 1,178.75

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Solution

The fourth proportional to 1,958.21, 2,938.05 and 1,178.75 is: 1,768.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.21 : 2,938.05 = 1,178.75 : x
  2. Step 2: Convert to fraction form
    1,958.21/2,938.05 = 1,178.75/x
  3. Step 3: Cross multiply
    1,958.21x = 2,938.05 × 1,178.75
  4. Step 4: Simplify right side
    1,958.21x = 3,463,205.85
  5. Step 5: Solve for x
    x = 3,463,205.85/1,958.21
  6. Step 6: Final answer
    x = 1,768.56

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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.