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Finding the Fourth Proportional to 1,891.80, 2,838.17 and 659.23

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Solution

The fourth proportional to 1,891.80, 2,838.17 and 659.23 is: 989.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.80 : 2,838.17 = 659.23 : x
  2. Step 2: Convert to fraction form
    1,891.80/2,838.17 = 659.23/x
  3. Step 3: Cross multiply
    1,891.80x = 2,838.17 × 659.23
  4. Step 4: Simplify right side
    1,891.80x = 1,870,992.62
  5. Step 5: Solve for x
    x = 1,870,992.62/1,891.80
  6. Step 6: Final answer
    x = 989.00

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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.