Home / 1,279.73-1,918.39-1,165.60

Finding the Fourth Proportional to 1,279.73, 1,918.39 and 1,165.60

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Solution

The fourth proportional to 1,279.73, 1,918.39 and 1,165.60 is: 1,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.73 : 1,918.39 = 1,165.60 : x
  2. Step 2: Convert to fraction form
    1,279.73/1,918.39 = 1,165.60/x
  3. Step 3: Cross multiply
    1,279.73x = 1,918.39 × 1,165.60
  4. Step 4: Simplify right side
    1,279.73x = 2,236,075.38
  5. Step 5: Solve for x
    x = 2,236,075.38/1,279.73
  6. Step 6: Final answer
    x = 1,747.31

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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.