Home / 1,397.14-2,091.39-1,120.12

Finding the Fourth Proportional to 1,397.14, 2,091.39 and 1,120.12

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Solution

The fourth proportional to 1,397.14, 2,091.39 and 1,120.12 is: 1,676.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.14 : 2,091.39 = 1,120.12 : x
  2. Step 2: Convert to fraction form
    1,397.14/2,091.39 = 1,120.12/x
  3. Step 3: Cross multiply
    1,397.14x = 2,091.39 × 1,120.12
  4. Step 4: Simplify right side
    1,397.14x = 2,342,607.77
  5. Step 5: Solve for x
    x = 2,342,607.77/1,397.14
  6. Step 6: Final answer
    x = 1,676.72

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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.