Home / 3,974.78-5,485.74-2,403.38

Finding the Fourth Proportional to 3,974.78, 5,485.74 and 2,403.38

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Solution

The fourth proportional to 3,974.78, 5,485.74 and 2,403.38 is: 3,316.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,974.78 : 5,485.74 = 2,403.38 : x
  2. Step 2: Convert to fraction form
    3,974.78/5,485.74 = 2,403.38/x
  3. Step 3: Cross multiply
    3,974.78x = 5,485.74 × 2,403.38
  4. Step 4: Simplify right side
    3,974.78x = 13,184,317.80
  5. Step 5: Solve for x
    x = 13,184,317.80/3,974.78
  6. Step 6: Final answer
    x = 3,316.99

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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.