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Finding the Fourth Proportional to 1,383.30, 1,908.92 and 793.95

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Solution

The fourth proportional to 1,383.30, 1,908.92 and 793.95 is: 1,095.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.30 : 1,908.92 = 793.95 : x
  2. Step 2: Convert to fraction form
    1,383.30/1,908.92 = 793.95/x
  3. Step 3: Cross multiply
    1,383.30x = 1,908.92 × 793.95
  4. Step 4: Simplify right side
    1,383.30x = 1,515,583.06
  5. Step 5: Solve for x
    x = 1,515,583.06/1,383.30
  6. Step 6: Final answer
    x = 1,095.63

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1.5x scale

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.