Home / 1,276.63-1,918.59-1,189.96

Finding the Fourth Proportional to 1,276.63, 1,918.59 and 1,189.96

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Solution

The fourth proportional to 1,276.63, 1,918.59 and 1,189.96 is: 1,788.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.63 : 1,918.59 = 1,189.96 : x
  2. Step 2: Convert to fraction form
    1,276.63/1,918.59 = 1,189.96/x
  3. Step 3: Cross multiply
    1,276.63x = 1,918.59 × 1,189.96
  4. Step 4: Simplify right side
    1,276.63x = 2,283,036.10
  5. Step 5: Solve for x
    x = 2,283,036.10/1,276.63
  6. Step 6: Final answer
    x = 1,788.33

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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.