Home / 1,698.62-2,343.26-1,139.21

Finding the Fourth Proportional to 1,698.62, 2,343.26 and 1,139.21

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Solution

The fourth proportional to 1,698.62, 2,343.26 and 1,139.21 is: 1,571.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.62 : 2,343.26 = 1,139.21 : x
  2. Step 2: Convert to fraction form
    1,698.62/2,343.26 = 1,139.21/x
  3. Step 3: Cross multiply
    1,698.62x = 2,343.26 × 1,139.21
  4. Step 4: Simplify right side
    1,698.62x = 2,669,447.81
  5. Step 5: Solve for x
    x = 2,669,447.81/1,698.62
  6. Step 6: Final answer
    x = 1,571.54

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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.