Home / 1,390.14-2,081.94-730.44

Finding the Fourth Proportional to 1,390.14, 2,081.94 and 730.44

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Solution

The fourth proportional to 1,390.14, 2,081.94 and 730.44 is: 1,093.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.14 : 2,081.94 = 730.44 : x
  2. Step 2: Convert to fraction form
    1,390.14/2,081.94 = 730.44/x
  3. Step 3: Cross multiply
    1,390.14x = 2,081.94 × 730.44
  4. Step 4: Simplify right side
    1,390.14x = 1,520,732.25
  5. Step 5: Solve for x
    x = 1,520,732.25/1,390.14
  6. Step 6: Final answer
    x = 1,093.94

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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.