Home / 2,912.12-4,019.40-1,778.18

Finding the Fourth Proportional to 2,912.12, 4,019.40 and 1,778.18

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Solution

The fourth proportional to 2,912.12, 4,019.40 and 1,778.18 is: 2,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.12 : 4,019.40 = 1,778.18 : x
  2. Step 2: Convert to fraction form
    2,912.12/4,019.40 = 1,778.18/x
  3. Step 3: Cross multiply
    2,912.12x = 4,019.40 × 1,778.18
  4. Step 4: Simplify right side
    2,912.12x = 7,147,211.67
  5. Step 5: Solve for x
    x = 7,147,211.67/2,912.12
  6. Step 6: Final answer
    x = 2,454.30

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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.