Home / 1,418.07-2,126.43-540.75

Finding the Fourth Proportional to 1,418.07, 2,126.43 and 540.75

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Solution

The fourth proportional to 1,418.07, 2,126.43 and 540.75 is: 810.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.07 : 2,126.43 = 540.75 : x
  2. Step 2: Convert to fraction form
    1,418.07/2,126.43 = 540.75/x
  3. Step 3: Cross multiply
    1,418.07x = 2,126.43 × 540.75
  4. Step 4: Simplify right side
    1,418.07x = 1,149,867.02
  5. Step 5: Solve for x
    x = 1,149,867.02/1,418.07
  6. Step 6: Final answer
    x = 810.87

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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.