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Finding the Fourth Proportional to 1,383.87, 1,910.07 and 1,243.74

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Solution

The fourth proportional to 1,383.87, 1,910.07 and 1,243.74 is: 1,716.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.87 : 1,910.07 = 1,243.74 : x
  2. Step 2: Convert to fraction form
    1,383.87/1,910.07 = 1,243.74/x
  3. Step 3: Cross multiply
    1,383.87x = 1,910.07 × 1,243.74
  4. Step 4: Simplify right side
    1,383.87x = 2,375,630.46
  5. Step 5: Solve for x
    x = 2,375,630.46/1,383.87
  6. Step 6: Final answer
    x = 1,716.66

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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.