Home / 2,660.85-3,670.52-1,989.36

Finding the Fourth Proportional to 2,660.85, 3,670.52 and 1,989.36

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Solution

The fourth proportional to 2,660.85, 3,670.52 and 1,989.36 is: 2,744.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.85 : 3,670.52 = 1,989.36 : x
  2. Step 2: Convert to fraction form
    2,660.85/3,670.52 = 1,989.36/x
  3. Step 3: Cross multiply
    2,660.85x = 3,670.52 × 1,989.36
  4. Step 4: Simplify right side
    2,660.85x = 7,301,975.72
  5. Step 5: Solve for x
    x = 7,301,975.72/2,660.85
  6. Step 6: Final answer
    x = 2,744.23

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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.