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Finding the Fourth Proportional to 1,960.48, 2,940.58 and 499.64

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Solution

The fourth proportional to 1,960.48, 2,940.58 and 499.64 is: 749.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.48 : 2,940.58 = 499.64 : x
  2. Step 2: Convert to fraction form
    1,960.48/2,940.58 = 499.64/x
  3. Step 3: Cross multiply
    1,960.48x = 2,940.58 × 499.64
  4. Step 4: Simplify right side
    1,960.48x = 1,469,231.39
  5. Step 5: Solve for x
    x = 1,469,231.39/1,960.48
  6. Step 6: Final answer
    x = 749.42

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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.