Home / 2,912.38-4,019.28-1,778.53

Finding the Fourth Proportional to 2,912.38, 4,019.28 and 1,778.53

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Solution

The fourth proportional to 2,912.38, 4,019.28 and 1,778.53 is: 2,454.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.38 : 4,019.28 = 1,778.53 : x
  2. Step 2: Convert to fraction form
    2,912.38/4,019.28 = 1,778.53/x
  3. Step 3: Cross multiply
    2,912.38x = 4,019.28 × 1,778.53
  4. Step 4: Simplify right side
    2,912.38x = 7,148,410.06
  5. Step 5: Solve for x
    x = 7,148,410.06/2,912.38
  6. Step 6: Final answer
    x = 2,454.49

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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.