Home / 2,079.61-3,119.43-1,428.37

Finding the Fourth Proportional to 2,079.61, 3,119.43 and 1,428.37

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Solution

The fourth proportional to 2,079.61, 3,119.43 and 1,428.37 is: 2,142.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.61 : 3,119.43 = 1,428.37 : x
  2. Step 2: Convert to fraction form
    2,079.61/3,119.43 = 1,428.37/x
  3. Step 3: Cross multiply
    2,079.61x = 3,119.43 × 1,428.37
  4. Step 4: Simplify right side
    2,079.61x = 4,455,700.23
  5. Step 5: Solve for x
    x = 4,455,700.23/2,079.61
  6. Step 6: Final answer
    x = 2,142.57

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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.