Home / 1,276.24-1,914.90-727.60

Finding the Fourth Proportional to 1,276.24, 1,914.90 and 727.60

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Solution

The fourth proportional to 1,276.24, 1,914.90 and 727.60 is: 1,091.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.24 : 1,914.90 = 727.60 : x
  2. Step 2: Convert to fraction form
    1,276.24/1,914.90 = 727.60/x
  3. Step 3: Cross multiply
    1,276.24x = 1,914.90 × 727.60
  4. Step 4: Simplify right side
    1,276.24x = 1,393,281.24
  5. Step 5: Solve for x
    x = 1,393,281.24/1,276.24
  6. Step 6: Final answer
    x = 1,091.71

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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.