Home / 2,780.12-3,832.81-1,783.67

Finding the Fourth Proportional to 2,780.12, 3,832.81 and 1,783.67

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Solution

The fourth proportional to 2,780.12, 3,832.81 and 1,783.67 is: 2,459.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.12 : 3,832.81 = 1,783.67 : x
  2. Step 2: Convert to fraction form
    2,780.12/3,832.81 = 1,783.67/x
  3. Step 3: Cross multiply
    2,780.12x = 3,832.81 × 1,783.67
  4. Step 4: Simplify right side
    2,780.12x = 6,836,449.05
  5. Step 5: Solve for x
    x = 6,836,449.05/2,780.12
  6. Step 6: Final answer
    x = 2,459.05

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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.