Home / 1,918.11-2,647.02-1,078.86

Finding the Fourth Proportional to 1,918.11, 2,647.02 and 1,078.86

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Solution

The fourth proportional to 1,918.11, 2,647.02 and 1,078.86 is: 1,488.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.11 : 2,647.02 = 1,078.86 : x
  2. Step 2: Convert to fraction form
    1,918.11/2,647.02 = 1,078.86/x
  3. Step 3: Cross multiply
    1,918.11x = 2,647.02 × 1,078.86
  4. Step 4: Simplify right side
    1,918.11x = 2,855,764.00
  5. Step 5: Solve for x
    x = 2,855,764.00/1,918.11
  6. Step 6: Final answer
    x = 1,488.84

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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.