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Finding the Fourth Proportional to 1,383.98, 1,909.05 and 886.44

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Solution

The fourth proportional to 1,383.98, 1,909.05 and 886.44 is: 1,222.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.98 : 1,909.05 = 886.44 : x
  2. Step 2: Convert to fraction form
    1,383.98/1,909.05 = 886.44/x
  3. Step 3: Cross multiply
    1,383.98x = 1,909.05 × 886.44
  4. Step 4: Simplify right side
    1,383.98x = 1,692,258.28
  5. Step 5: Solve for x
    x = 1,692,258.28/1,383.98
  6. Step 6: Final answer
    x = 1,222.75

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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.