Home / 1,918.24-2,647.16-1,078.96

Finding the Fourth Proportional to 1,918.24, 2,647.16 and 1,078.96

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Solution

The fourth proportional to 1,918.24, 2,647.16 and 1,078.96 is: 1,488.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.24 : 2,647.16 = 1,078.96 : x
  2. Step 2: Convert to fraction form
    1,918.24/2,647.16 = 1,078.96/x
  3. Step 3: Cross multiply
    1,918.24x = 2,647.16 × 1,078.96
  4. Step 4: Simplify right side
    1,918.24x = 2,856,179.75
  5. Step 5: Solve for x
    x = 2,856,179.75/1,918.24
  6. Step 6: Final answer
    x = 1,488.96

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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.