Home / 2,783.13-4,171.55-1,138.78

Finding the Fourth Proportional to 2,783.13, 4,171.55 and 1,138.78

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Solution

The fourth proportional to 2,783.13, 4,171.55 and 1,138.78 is: 1,706.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.13 : 4,171.55 = 1,138.78 : x
  2. Step 2: Convert to fraction form
    2,783.13/4,171.55 = 1,138.78/x
  3. Step 3: Cross multiply
    2,783.13x = 4,171.55 × 1,138.78
  4. Step 4: Simplify right side
    2,783.13x = 4,750,460.17
  5. Step 5: Solve for x
    x = 4,750,460.17/2,783.13
  6. Step 6: Final answer
    x = 1,706.88

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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.