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Finding the Fourth Proportional to 1,383.44, 1,908.25 and 885.29

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Solution

The fourth proportional to 1,383.44, 1,908.25 and 885.29 is: 1,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.44 : 1,908.25 = 885.29 : x
  2. Step 2: Convert to fraction form
    1,383.44/1,908.25 = 885.29/x
  3. Step 3: Cross multiply
    1,383.44x = 1,908.25 × 885.29
  4. Step 4: Simplify right side
    1,383.44x = 1,689,354.64
  5. Step 5: Solve for x
    x = 1,689,354.64/1,383.44
  6. Step 6: Final answer
    x = 1,221.13

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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.