Home / 1,981.80-2,965.66-1,288.04

Finding the Fourth Proportional to 1,981.80, 2,965.66 and 1,288.04

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Solution

The fourth proportional to 1,981.80, 2,965.66 and 1,288.04 is: 1,927.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.80 : 2,965.66 = 1,288.04 : x
  2. Step 2: Convert to fraction form
    1,981.80/2,965.66 = 1,288.04/x
  3. Step 3: Cross multiply
    1,981.80x = 2,965.66 × 1,288.04
  4. Step 4: Simplify right side
    1,981.80x = 3,819,888.71
  5. Step 5: Solve for x
    x = 3,819,888.71/1,981.80
  6. Step 6: Final answer
    x = 1,927.48

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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.