Home / 1,418.12-2,126.99-378.21

Finding the Fourth Proportional to 1,418.12, 2,126.99 and 378.21

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Solution

The fourth proportional to 1,418.12, 2,126.99 and 378.21 is: 567.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.12 : 2,126.99 = 378.21 : x
  2. Step 2: Convert to fraction form
    1,418.12/2,126.99 = 378.21/x
  3. Step 3: Cross multiply
    1,418.12x = 2,126.99 × 378.21
  4. Step 4: Simplify right side
    1,418.12x = 804,448.89
  5. Step 5: Solve for x
    x = 804,448.89/1,418.12
  6. Step 6: Final answer
    x = 567.26

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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.