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Finding the Fourth Proportional to 2,973.68, 4,104.36 and 1,979

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Solution

The fourth proportional to 2,973.68, 4,104.36 and 1,979 is: 2,731.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,973.68 : 4,104.36 = 1,979 : x
  2. Step 2: Convert to fraction form
    2,973.68/4,104.36 = 1,979/x
  3. Step 3: Cross multiply
    2,973.68x = 4,104.36 × 1,979
  4. Step 4: Simplify right side
    2,973.68x = 8,122,528.44
  5. Step 5: Solve for x
    x = 8,122,528.44/2,973.68
  6. Step 6: Final answer
    x = 2,731.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.