Home / 2,919.78-4,381.29-1,188

Finding the Fourth Proportional to 2,919.78, 4,381.29 and 1,188

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Solution

The fourth proportional to 2,919.78, 4,381.29 and 1,188 is: 1,782.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.78 : 4,381.29 = 1,188 : x
  2. Step 2: Convert to fraction form
    2,919.78/4,381.29 = 1,188/x
  3. Step 3: Cross multiply
    2,919.78x = 4,381.29 × 1,188
  4. Step 4: Simplify right side
    2,919.78x = 5,204,972.52
  5. Step 5: Solve for x
    x = 5,204,972.52/2,919.78
  6. Step 6: Final answer
    x = 1,782.66

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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.