Home / 1,311.44-1,967.09-1,105.65

Finding the Fourth Proportional to 1,311.44, 1,967.09 and 1,105.65

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Solution

The fourth proportional to 1,311.44, 1,967.09 and 1,105.65 is: 1,658.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.44 : 1,967.09 = 1,105.65 : x
  2. Step 2: Convert to fraction form
    1,311.44/1,967.09 = 1,105.65/x
  3. Step 3: Cross multiply
    1,311.44x = 1,967.09 × 1,105.65
  4. Step 4: Simplify right side
    1,311.44x = 2,174,907.53
  5. Step 5: Solve for x
    x = 2,174,907.53/1,311.44
  6. Step 6: Final answer
    x = 1,658.42

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1.5x scale

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.