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Finding the Fourth Proportional to 1,536.97, 2,120.99 and 873.82

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Solution

The fourth proportional to 1,536.97, 2,120.99 and 873.82 is: 1,205.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.97 : 2,120.99 = 873.82 : x
  2. Step 2: Convert to fraction form
    1,536.97/2,120.99 = 873.82/x
  3. Step 3: Cross multiply
    1,536.97x = 2,120.99 × 873.82
  4. Step 4: Simplify right side
    1,536.97x = 1,853,363.48
  5. Step 5: Solve for x
    x = 1,853,363.48/1,536.97
  6. Step 6: Final answer
    x = 1,205.86

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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.