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Finding the Fourth Proportional to 1,328.68, 1,991.57 and 1,019.73

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Solution

The fourth proportional to 1,328.68, 1,991.57 and 1,019.73 is: 1,528.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.68 : 1,991.57 = 1,019.73 : x
  2. Step 2: Convert to fraction form
    1,328.68/1,991.57 = 1,019.73/x
  3. Step 3: Cross multiply
    1,328.68x = 1,991.57 × 1,019.73
  4. Step 4: Simplify right side
    1,328.68x = 2,030,858.58
  5. Step 5: Solve for x
    x = 2,030,858.58/1,328.68
  6. Step 6: Final answer
    x = 1,528.48

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1.5x scale

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.