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Finding the Fourth Proportional to 1,383.23, 1,908.48 and 963.11

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Solution

The fourth proportional to 1,383.23, 1,908.48 and 963.11 is: 1,328.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.23 : 1,908.48 = 963.11 : x
  2. Step 2: Convert to fraction form
    1,383.23/1,908.48 = 963.11/x
  3. Step 3: Cross multiply
    1,383.23x = 1,908.48 × 963.11
  4. Step 4: Simplify right side
    1,383.23x = 1,838,076.17
  5. Step 5: Solve for x
    x = 1,838,076.17/1,383.23
  6. Step 6: Final answer
    x = 1,328.83

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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.