Home / 1,311.66-1,804.68-1,279.26

Finding the Fourth Proportional to 1,311.66, 1,804.68 and 1,279.26

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Solution

The fourth proportional to 1,311.66, 1,804.68 and 1,279.26 is: 1,760.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.66 : 1,804.68 = 1,279.26 : x
  2. Step 2: Convert to fraction form
    1,311.66/1,804.68 = 1,279.26/x
  3. Step 3: Cross multiply
    1,311.66x = 1,804.68 × 1,279.26
  4. Step 4: Simplify right side
    1,311.66x = 2,308,654.94
  5. Step 5: Solve for x
    x = 2,308,654.94/1,311.66
  6. Step 6: Final answer
    x = 1,760.10

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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.