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Finding the Fourth Proportional to 1,383.32, 1,909 and 793.94

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Solution

The fourth proportional to 1,383.32, 1,909 and 793.94 is: 1,095.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.32 : 1,909 = 793.94 : x
  2. Step 2: Convert to fraction form
    1,383.32/1,909 = 793.94/x
  3. Step 3: Cross multiply
    1,383.32x = 1,909 × 793.94
  4. Step 4: Simplify right side
    1,383.32x = 1,515,631.46
  5. Step 5: Solve for x
    x = 1,515,631.46/1,383.32
  6. Step 6: Final answer
    x = 1,095.65

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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.