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Finding the Fourth Proportional to 2,748.69, 4,122.47 and 969.99

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Solution

The fourth proportional to 2,748.69, 4,122.47 and 969.99 is: 1,454.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,748.69 : 4,122.47 = 969.99 : x
  2. Step 2: Convert to fraction form
    2,748.69/4,122.47 = 969.99/x
  3. Step 3: Cross multiply
    2,748.69x = 4,122.47 × 969.99
  4. Step 4: Simplify right side
    2,748.69x = 3,998,749.83
  5. Step 5: Solve for x
    x = 3,998,749.83/2,748.69
  6. Step 6: Final answer
    x = 1,454.78

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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.