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Finding the Fourth Proportional to 1,168.11, 1,611.36 and 1,004.49

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Solution

The fourth proportional to 1,168.11, 1,611.36 and 1,004.49 is: 1,385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.11 : 1,611.36 = 1,004.49 : x
  2. Step 2: Convert to fraction form
    1,168.11/1,611.36 = 1,004.49/x
  3. Step 3: Cross multiply
    1,168.11x = 1,611.36 × 1,004.49
  4. Step 4: Simplify right side
    1,168.11x = 1,618,595.01
  5. Step 5: Solve for x
    x = 1,618,595.01/1,168.11
  6. Step 6: Final answer
    x = 1,385.65

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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.