Home / 3,975.36-5,485.56-2,381.64

Finding the Fourth Proportional to 3,975.36, 5,485.56 and 2,381.64

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Solution

The fourth proportional to 3,975.36, 5,485.56 and 2,381.64 is: 3,286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.36 : 5,485.56 = 2,381.64 : x
  2. Step 2: Convert to fraction form
    3,975.36/5,485.56 = 2,381.64/x
  3. Step 3: Cross multiply
    3,975.36x = 5,485.56 × 2,381.64
  4. Step 4: Simplify right side
    3,975.36x = 13,064,629.12
  5. Step 5: Solve for x
    x = 13,064,629.12/3,975.36
  6. Step 6: Final answer
    x = 3,286.40

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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.