Home / 2,231.28-3,078.81-1,347.17

Finding the Fourth Proportional to 2,231.28, 3,078.81 and 1,347.17

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Solution

The fourth proportional to 2,231.28, 3,078.81 and 1,347.17 is: 1,858.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.28 : 3,078.81 = 1,347.17 : x
  2. Step 2: Convert to fraction form
    2,231.28/3,078.81 = 1,347.17/x
  3. Step 3: Cross multiply
    2,231.28x = 3,078.81 × 1,347.17
  4. Step 4: Simplify right side
    2,231.28x = 4,147,665.07
  5. Step 5: Solve for x
    x = 4,147,665.07/2,231.28
  6. Step 6: Final answer
    x = 1,858.87

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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.