Home / 1,211.88-1,670.58-949.44

Finding the Fourth Proportional to 1,211.88, 1,670.58 and 949.44

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Solution

The fourth proportional to 1,211.88, 1,670.58 and 949.44 is: 1,308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.88 : 1,670.58 = 949.44 : x
  2. Step 2: Convert to fraction form
    1,211.88/1,670.58 = 949.44/x
  3. Step 3: Cross multiply
    1,211.88x = 1,670.58 × 949.44
  4. Step 4: Simplify right side
    1,211.88x = 1,586,115.48
  5. Step 5: Solve for x
    x = 1,586,115.48/1,211.88
  6. Step 6: Final answer
    x = 1,308.81

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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.