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Finding the Fourth Proportional to 2,103.84, 3,155 and 949.60

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Solution

The fourth proportional to 2,103.84, 3,155 and 949.60 is: 1,424.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.84 : 3,155 = 949.60 : x
  2. Step 2: Convert to fraction form
    2,103.84/3,155 = 949.60/x
  3. Step 3: Cross multiply
    2,103.84x = 3,155 × 949.60
  4. Step 4: Simplify right side
    2,103.84x = 2,995,988
  5. Step 5: Solve for x
    x = 2,995,988/2,103.84
  6. Step 6: Final answer
    x = 1,424.06

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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.