Home / 2,418.20-3,335.08-2,138.68

Finding the Fourth Proportional to 2,418.20, 3,335.08 and 2,138.68

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Solution

The fourth proportional to 2,418.20, 3,335.08 and 2,138.68 is: 2,949.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,418.20 : 3,335.08 = 2,138.68 : x
  2. Step 2: Convert to fraction form
    2,418.20/3,335.08 = 2,138.68/x
  3. Step 3: Cross multiply
    2,418.20x = 3,335.08 × 2,138.68
  4. Step 4: Simplify right side
    2,418.20x = 7,132,668.89
  5. Step 5: Solve for x
    x = 7,132,668.89/2,418.20
  6. Step 6: Final answer
    x = 2,949.58

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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.