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Finding the Fourth Proportional to 3,393.72, 4,679.64 and 2,947.68

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Solution

The fourth proportional to 3,393.72, 4,679.64 and 2,947.68 is: 4,064.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,393.72 : 4,679.64 = 2,947.68 : x
  2. Step 2: Convert to fraction form
    3,393.72/4,679.64 = 2,947.68/x
  3. Step 3: Cross multiply
    3,393.72x = 4,679.64 × 2,947.68
  4. Step 4: Simplify right side
    3,393.72x = 13,794,081.24
  5. Step 5: Solve for x
    x = 13,794,081.24/3,393.72
  6. Step 6: Final answer
    x = 4,064.59

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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.