Home / 2,389.68-3,288.78-2,021.49

Finding the Fourth Proportional to 2,389.68, 3,288.78 and 2,021.49

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Solution

The fourth proportional to 2,389.68, 3,288.78 and 2,021.49 is: 2,782.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.68 : 3,288.78 = 2,021.49 : x
  2. Step 2: Convert to fraction form
    2,389.68/3,288.78 = 2,021.49/x
  3. Step 3: Cross multiply
    2,389.68x = 3,288.78 × 2,021.49
  4. Step 4: Simplify right side
    2,389.68x = 6,648,235.88
  5. Step 5: Solve for x
    x = 6,648,235.88/2,389.68
  6. Step 6: Final answer
    x = 2,782.06

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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.