Home / 1,918.63-2,647.11-1,079.20

Finding the Fourth Proportional to 1,918.63, 2,647.11 and 1,079.20

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Solution

The fourth proportional to 1,918.63, 2,647.11 and 1,079.20 is: 1,488.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.63 : 2,647.11 = 1,079.20 : x
  2. Step 2: Convert to fraction form
    1,918.63/2,647.11 = 1,079.20/x
  3. Step 3: Cross multiply
    1,918.63x = 2,647.11 × 1,079.20
  4. Step 4: Simplify right side
    1,918.63x = 2,856,761.11
  5. Step 5: Solve for x
    x = 2,856,761.11/1,918.63
  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.