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Finding the Fourth Proportional to 2,969.94, 4,455.92 and 1,121.58

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Solution

The fourth proportional to 2,969.94, 4,455.92 and 1,121.58 is: 1,682.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,969.94 : 4,455.92 = 1,121.58 : x
  2. Step 2: Convert to fraction form
    2,969.94/4,455.92 = 1,121.58/x
  3. Step 3: Cross multiply
    2,969.94x = 4,455.92 × 1,121.58
  4. Step 4: Simplify right side
    2,969.94x = 4,997,670.75
  5. Step 5: Solve for x
    x = 4,997,670.75/2,969.94
  6. Step 6: Final answer
    x = 1,682.75

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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.