Home / 2,885.10-3,980.20-1,765.68

Finding the Fourth Proportional to 2,885.10, 3,980.20 and 1,765.68

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Solution

The fourth proportional to 2,885.10, 3,980.20 and 1,765.68 is: 2,435.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,885.10 : 3,980.20 = 1,765.68 : x
  2. Step 2: Convert to fraction form
    2,885.10/3,980.20 = 1,765.68/x
  3. Step 3: Cross multiply
    2,885.10x = 3,980.20 × 1,765.68
  4. Step 4: Simplify right side
    2,885.10x = 7,027,759.54
  5. Step 5: Solve for x
    x = 7,027,759.54/2,885.10
  6. Step 6: Final answer
    x = 2,435.88

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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.