Home / 2,912.22-4,016.80-1,917.18

Finding the Fourth Proportional to 2,912.22, 4,016.80 and 1,917.18

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Solution

The fourth proportional to 2,912.22, 4,016.80 and 1,917.18 is: 2,644.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.22 : 4,016.80 = 1,917.18 : x
  2. Step 2: Convert to fraction form
    2,912.22/4,016.80 = 1,917.18/x
  3. Step 3: Cross multiply
    2,912.22x = 4,016.80 × 1,917.18
  4. Step 4: Simplify right side
    2,912.22x = 7,700,928.62
  5. Step 5: Solve for x
    x = 7,700,928.62/2,912.22
  6. Step 6: Final answer
    x = 2,644.35

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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.