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Finding the Fourth Proportional to 1,965.64, 2,947.56 and 794.68

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Solution

The fourth proportional to 1,965.64, 2,947.56 and 794.68 is: 1,191.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.64 : 2,947.56 = 794.68 : x
  2. Step 2: Convert to fraction form
    1,965.64/2,947.56 = 794.68/x
  3. Step 3: Cross multiply
    1,965.64x = 2,947.56 × 794.68
  4. Step 4: Simplify right side
    1,965.64x = 2,342,366.98
  5. Step 5: Solve for x
    x = 2,342,366.98/1,965.64
  6. Step 6: Final answer
    x = 1,191.66

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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.