Home / 2,980.21-4,103.28-2,269.78

Finding the Fourth Proportional to 2,980.21, 4,103.28 and 2,269.78

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Solution

The fourth proportional to 2,980.21, 4,103.28 and 2,269.78 is: 3,125.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.21 : 4,103.28 = 2,269.78 : x
  2. Step 2: Convert to fraction form
    2,980.21/4,103.28 = 2,269.78/x
  3. Step 3: Cross multiply
    2,980.21x = 4,103.28 × 2,269.78
  4. Step 4: Simplify right side
    2,980.21x = 9,313,542.88
  5. Step 5: Solve for x
    x = 9,313,542.88/2,980.21
  6. Step 6: Final answer
    x = 3,125.13

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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.