Home / 2,281.24-3,147.34-1,286.40

Finding the Fourth Proportional to 2,281.24, 3,147.34 and 1,286.40

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Solution

The fourth proportional to 2,281.24, 3,147.34 and 1,286.40 is: 1,774.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.24 : 3,147.34 = 1,286.40 : x
  2. Step 2: Convert to fraction form
    2,281.24/3,147.34 = 1,286.40/x
  3. Step 3: Cross multiply
    2,281.24x = 3,147.34 × 1,286.40
  4. Step 4: Simplify right side
    2,281.24x = 4,048,738.18
  5. Step 5: Solve for x
    x = 4,048,738.18/2,281.24
  6. Step 6: Final answer
    x = 1,774.80

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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.