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Finding the Fourth Proportional to 1,383.54, 2,078.01 and 1,332.78

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Solution

The fourth proportional to 1,383.54, 2,078.01 and 1,332.78 is: 2,001.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.54 : 2,078.01 = 1,332.78 : x
  2. Step 2: Convert to fraction form
    1,383.54/2,078.01 = 1,332.78/x
  3. Step 3: Cross multiply
    1,383.54x = 2,078.01 × 1,332.78
  4. Step 4: Simplify right side
    1,383.54x = 2,769,530.17
  5. Step 5: Solve for x
    x = 2,769,530.17/1,383.54
  6. Step 6: Final answer
    x = 2,001.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.