Home / 1,912.08-2,868.16-613.64

Finding the Fourth Proportional to 1,912.08, 2,868.16 and 613.64

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Solution

The fourth proportional to 1,912.08, 2,868.16 and 613.64 is: 920.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.08 : 2,868.16 = 613.64 : x
  2. Step 2: Convert to fraction form
    1,912.08/2,868.16 = 613.64/x
  3. Step 3: Cross multiply
    1,912.08x = 2,868.16 × 613.64
  4. Step 4: Simplify right side
    1,912.08x = 1,760,017.70
  5. Step 5: Solve for x
    x = 1,760,017.70/1,912.08
  6. Step 6: Final answer
    x = 920.47

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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.