Home / 1,396.13-2,091.36-1,120.73

Finding the Fourth Proportional to 1,396.13, 2,091.36 and 1,120.73

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Solution

The fourth proportional to 1,396.13, 2,091.36 and 1,120.73 is: 1,678.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.13 : 2,091.36 = 1,120.73 : x
  2. Step 2: Convert to fraction form
    1,396.13/2,091.36 = 1,120.73/x
  3. Step 3: Cross multiply
    1,396.13x = 2,091.36 × 1,120.73
  4. Step 4: Simplify right side
    1,396.13x = 2,343,849.89
  5. Step 5: Solve for x
    x = 2,343,849.89/1,396.13
  6. Step 6: Final answer
    x = 1,678.82

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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.