Home / 2,428.90-3,640.15-2,153.70

Finding the Fourth Proportional to 2,428.90, 3,640.15 and 2,153.70

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Solution

The fourth proportional to 2,428.90, 3,640.15 and 2,153.70 is: 3,227.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.90 : 3,640.15 = 2,153.70 : x
  2. Step 2: Convert to fraction form
    2,428.90/3,640.15 = 2,153.70/x
  3. Step 3: Cross multiply
    2,428.90x = 3,640.15 × 2,153.70
  4. Step 4: Simplify right side
    2,428.90x = 7,839,791.06
  5. Step 5: Solve for x
    x = 7,839,791.06/2,428.90
  6. Step 6: Final answer
    x = 3,227.71

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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.