Home / 1,276.20-1,749.87-1,151.37

Finding the Fourth Proportional to 1,276.20, 1,749.87 and 1,151.37

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Solution

The fourth proportional to 1,276.20, 1,749.87 and 1,151.37 is: 1,578.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.20 : 1,749.87 = 1,151.37 : x
  2. Step 2: Convert to fraction form
    1,276.20/1,749.87 = 1,151.37/x
  3. Step 3: Cross multiply
    1,276.20x = 1,749.87 × 1,151.37
  4. Step 4: Simplify right side
    1,276.20x = 2,014,747.82
  5. Step 5: Solve for x
    x = 2,014,747.82/1,276.20
  6. Step 6: Final answer
    x = 1,578.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.