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Finding the Fourth Proportional to 2,965.76, 4,092.40 and 1,639.47

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Solution

The fourth proportional to 2,965.76, 4,092.40 and 1,639.47 is: 2,262.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,965.76 : 4,092.40 = 1,639.47 : x
  2. Step 2: Convert to fraction form
    2,965.76/4,092.40 = 1,639.47/x
  3. Step 3: Cross multiply
    2,965.76x = 4,092.40 × 1,639.47
  4. Step 4: Simplify right side
    2,965.76x = 6,709,367.03
  5. Step 5: Solve for x
    x = 6,709,367.03/2,965.76
  6. Step 6: Final answer
    x = 2,262.28

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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.