Home / 1,395.66-2,091.42-931.85

Finding the Fourth Proportional to 1,395.66, 2,091.42 and 931.85

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Solution

The fourth proportional to 1,395.66, 2,091.42 and 931.85 is: 1,396.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.66 : 2,091.42 = 931.85 : x
  2. Step 2: Convert to fraction form
    1,395.66/2,091.42 = 931.85/x
  3. Step 3: Cross multiply
    1,395.66x = 2,091.42 × 931.85
  4. Step 4: Simplify right side
    1,395.66x = 1,948,879.27
  5. Step 5: Solve for x
    x = 1,948,879.27/1,395.66
  6. Step 6: Final answer
    x = 1,396.39

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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.