Home / 2,680.80-4,018.48-1,815.20

Finding the Fourth Proportional to 2,680.80, 4,018.48 and 1,815.20

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Solution

The fourth proportional to 2,680.80, 4,018.48 and 1,815.20 is: 2,720.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.80 : 4,018.48 = 1,815.20 : x
  2. Step 2: Convert to fraction form
    2,680.80/4,018.48 = 1,815.20/x
  3. Step 3: Cross multiply
    2,680.80x = 4,018.48 × 1,815.20
  4. Step 4: Simplify right side
    2,680.80x = 7,294,344.90
  5. Step 5: Solve for x
    x = 7,294,344.90/2,680.80
  6. Step 6: Final answer
    x = 2,720.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.