Home / 2,928.09-4,391.21-979.84

Finding the Fourth Proportional to 2,928.09, 4,391.21 and 979.84

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Solution

The fourth proportional to 2,928.09, 4,391.21 and 979.84 is: 1,469.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.09 : 4,391.21 = 979.84 : x
  2. Step 2: Convert to fraction form
    2,928.09/4,391.21 = 979.84/x
  3. Step 3: Cross multiply
    2,928.09x = 4,391.21 × 979.84
  4. Step 4: Simplify right side
    2,928.09x = 4,302,683.21
  5. Step 5: Solve for x
    x = 4,302,683.21/2,928.09
  6. Step 6: Final answer
    x = 1,469.45

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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.