Home / 1,311.19-1,808.67-845.44

Finding the Fourth Proportional to 1,311.19, 1,808.67 and 845.44

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Solution

The fourth proportional to 1,311.19, 1,808.67 and 845.44 is: 1,166.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.19 : 1,808.67 = 845.44 : x
  2. Step 2: Convert to fraction form
    1,311.19/1,808.67 = 845.44/x
  3. Step 3: Cross multiply
    1,311.19x = 1,808.67 × 845.44
  4. Step 4: Simplify right side
    1,311.19x = 1,529,121.96
  5. Step 5: Solve for x
    x = 1,529,121.96/1,311.19
  6. Step 6: Final answer
    x = 1,166.21

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Half scale
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Double scale
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1.5x scale

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.