Home / 2,122.36-2,928.54-1,190.68

Finding the Fourth Proportional to 2,122.36, 2,928.54 and 1,190.68

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Solution

The fourth proportional to 2,122.36, 2,928.54 and 1,190.68 is: 1,642.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.36 : 2,928.54 = 1,190.68 : x
  2. Step 2: Convert to fraction form
    2,122.36/2,928.54 = 1,190.68/x
  3. Step 3: Cross multiply
    2,122.36x = 2,928.54 × 1,190.68
  4. Step 4: Simplify right side
    2,122.36x = 3,486,954.01
  5. Step 5: Solve for x
    x = 3,486,954.01/2,122.36
  6. Step 6: Final answer
    x = 1,642.96

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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.