Home / 1,428.30-2,140.97-605.88

Finding the Fourth Proportional to 1,428.30, 2,140.97 and 605.88

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Solution

The fourth proportional to 1,428.30, 2,140.97 and 605.88 is: 908.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.30 : 2,140.97 = 605.88 : x
  2. Step 2: Convert to fraction form
    1,428.30/2,140.97 = 605.88/x
  3. Step 3: Cross multiply
    1,428.30x = 2,140.97 × 605.88
  4. Step 4: Simplify right side
    1,428.30x = 1,297,167.87
  5. Step 5: Solve for x
    x = 1,297,167.87/1,428.30
  6. Step 6: Final answer
    x = 908.19

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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.