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Finding the Fourth Proportional to 1,351.11, 1,858.67 and 1,101.88

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Solution

The fourth proportional to 1,351.11, 1,858.67 and 1,101.88 is: 1,515.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.11 : 1,858.67 = 1,101.88 : x
  2. Step 2: Convert to fraction form
    1,351.11/1,858.67 = 1,101.88/x
  3. Step 3: Cross multiply
    1,351.11x = 1,858.67 × 1,101.88
  4. Step 4: Simplify right side
    1,351.11x = 2,048,031.30
  5. Step 5: Solve for x
    x = 2,048,031.30/1,351.11
  6. Step 6: Final answer
    x = 1,515.81

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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.