Home / 1,211.28-1,671.57-1,091.88

Finding the Fourth Proportional to 1,211.28, 1,671.57 and 1,091.88

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Solution

The fourth proportional to 1,211.28, 1,671.57 and 1,091.88 is: 1,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.28 : 1,671.57 = 1,091.88 : x
  2. Step 2: Convert to fraction form
    1,211.28/1,671.57 = 1,091.88/x
  3. Step 3: Cross multiply
    1,211.28x = 1,671.57 × 1,091.88
  4. Step 4: Simplify right side
    1,211.28x = 1,825,153.85
  5. Step 5: Solve for x
    x = 1,825,153.85/1,211.28
  6. Step 6: Final answer
    x = 1,506.80

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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.