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Finding the Fourth Proportional to 1,351.82, 1,865.26 and 854.11

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Solution

The fourth proportional to 1,351.82, 1,865.26 and 854.11 is: 1,178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.82 : 1,865.26 = 854.11 : x
  2. Step 2: Convert to fraction form
    1,351.82/1,865.26 = 854.11/x
  3. Step 3: Cross multiply
    1,351.82x = 1,865.26 × 854.11
  4. Step 4: Simplify right side
    1,351.82x = 1,593,140.62
  5. Step 5: Solve for x
    x = 1,593,140.62/1,351.82
  6. Step 6: Final answer
    x = 1,178.51

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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.