Home / 1,418.82-2,128.23-1,386.42

Finding the Fourth Proportional to 1,418.82, 2,128.23 and 1,386.42

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Solution

The fourth proportional to 1,418.82, 2,128.23 and 1,386.42 is: 2,079.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.82 : 2,128.23 = 1,386.42 : x
  2. Step 2: Convert to fraction form
    1,418.82/2,128.23 = 1,386.42/x
  3. Step 3: Cross multiply
    1,418.82x = 2,128.23 × 1,386.42
  4. Step 4: Simplify right side
    1,418.82x = 2,950,620.64
  5. Step 5: Solve for x
    x = 2,950,620.64/1,418.82
  6. Step 6: Final answer
    x = 2,079.63

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1.5x scale

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.