Home / 2,280.81-3,147.60-1,286.11

Finding the Fourth Proportional to 2,280.81, 3,147.60 and 1,286.11

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Solution

The fourth proportional to 2,280.81, 3,147.60 and 1,286.11 is: 1,774.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.81 : 3,147.60 = 1,286.11 : x
  2. Step 2: Convert to fraction form
    2,280.81/3,147.60 = 1,286.11/x
  3. Step 3: Cross multiply
    2,280.81x = 3,147.60 × 1,286.11
  4. Step 4: Simplify right side
    2,280.81x = 4,048,159.84
  5. Step 5: Solve for x
    x = 4,048,159.84/2,280.81
  6. Step 6: Final answer
    x = 1,774.88

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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.