Home / 2,815.89-4,224.83-1,428.17

Finding the Fourth Proportional to 2,815.89, 4,224.83 and 1,428.17

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Solution

The fourth proportional to 2,815.89, 4,224.83 and 1,428.17 is: 2,142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.89 : 4,224.83 = 1,428.17 : x
  2. Step 2: Convert to fraction form
    2,815.89/4,224.83 = 1,428.17/x
  3. Step 3: Cross multiply
    2,815.89x = 4,224.83 × 1,428.17
  4. Step 4: Simplify right side
    2,815.89x = 6,033,754.34
  5. Step 5: Solve for x
    x = 6,033,754.34/2,815.89
  6. Step 6: Final answer
    x = 2,142.76

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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.