Home / 1,428.24-2,142.20-605.90

Finding the Fourth Proportional to 1,428.24, 2,142.20 and 605.90

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Solution

The fourth proportional to 1,428.24, 2,142.20 and 605.90 is: 908.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.24 : 2,142.20 = 605.90 : x
  2. Step 2: Convert to fraction form
    1,428.24/2,142.20 = 605.90/x
  3. Step 3: Cross multiply
    1,428.24x = 2,142.20 × 605.90
  4. Step 4: Simplify right side
    1,428.24x = 1,297,945.24
  5. Step 5: Solve for x
    x = 1,297,945.24/1,428.24
  6. Step 6: Final answer
    x = 908.77

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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.