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Finding the Fourth Proportional to 1,838.13, 2,536.61 and 998.82

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Solution

The fourth proportional to 1,838.13, 2,536.61 and 998.82 is: 1,378.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.13 : 2,536.61 = 998.82 : x
  2. Step 2: Convert to fraction form
    1,838.13/2,536.61 = 998.82/x
  3. Step 3: Cross multiply
    1,838.13x = 2,536.61 × 998.82
  4. Step 4: Simplify right side
    1,838.13x = 2,533,616.80
  5. Step 5: Solve for x
    x = 2,533,616.80/1,838.13
  6. Step 6: Final answer
    x = 1,378.37

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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.