Home / 1,380.81-2,071.22-1,296.33

Finding the Fourth Proportional to 1,380.81, 2,071.22 and 1,296.33

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Solution

The fourth proportional to 1,380.81, 2,071.22 and 1,296.33 is: 1,944.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.81 : 2,071.22 = 1,296.33 : x
  2. Step 2: Convert to fraction form
    1,380.81/2,071.22 = 1,296.33/x
  3. Step 3: Cross multiply
    1,380.81x = 2,071.22 × 1,296.33
  4. Step 4: Simplify right side
    1,380.81x = 2,684,978.14
  5. Step 5: Solve for x
    x = 2,684,978.14/1,380.81
  6. Step 6: Final answer
    x = 1,944.50

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Double scale
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Similar ratio
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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.