Home / 3,975.76-5,485.44-2,485.20

Finding the Fourth Proportional to 3,975.76, 5,485.44 and 2,485.20

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Solution

The fourth proportional to 3,975.76, 5,485.44 and 2,485.20 is: 3,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.76 : 5,485.44 = 2,485.20 : x
  2. Step 2: Convert to fraction form
    3,975.76/5,485.44 = 2,485.20/x
  3. Step 3: Cross multiply
    3,975.76x = 5,485.44 × 2,485.20
  4. Step 4: Simplify right side
    3,975.76x = 13,632,388.06
  5. Step 5: Solve for x
    x = 13,632,388.06/3,975.76
  6. Step 6: Final answer
    x = 3,428.88

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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.