Home / 2,884.41-3,980.30-1,689.21

Finding the Fourth Proportional to 2,884.41, 3,980.30 and 1,689.21

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Solution

The fourth proportional to 2,884.41, 3,980.30 and 1,689.21 is: 2,331.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,884.41 : 3,980.30 = 1,689.21 : x
  2. Step 2: Convert to fraction form
    2,884.41/3,980.30 = 1,689.21/x
  3. Step 3: Cross multiply
    2,884.41x = 3,980.30 × 1,689.21
  4. Step 4: Simplify right side
    2,884.41x = 6,723,554.12
  5. Step 5: Solve for x
    x = 6,723,554.12/2,884.41
  6. Step 6: Final answer
    x = 2,331.00

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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.