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Finding the Fourth Proportional to 1,383.58, 1,908.39 and 1,175.14

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Solution

The fourth proportional to 1,383.58, 1,908.39 and 1,175.14 is: 1,620.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.58 : 1,908.39 = 1,175.14 : x
  2. Step 2: Convert to fraction form
    1,383.58/1,908.39 = 1,175.14/x
  3. Step 3: Cross multiply
    1,383.58x = 1,908.39 × 1,175.14
  4. Step 4: Simplify right side
    1,383.58x = 2,242,625.42
  5. Step 5: Solve for x
    x = 2,242,625.42/1,383.58
  6. Step 6: Final answer
    x = 1,620.89

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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.