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Finding the Fourth Proportional to 1,910.73, 2,867.90 and 986.92

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Solution

The fourth proportional to 1,910.73, 2,867.90 and 986.92 is: 1,481.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.73 : 2,867.90 = 986.92 : x
  2. Step 2: Convert to fraction form
    1,910.73/2,867.90 = 986.92/x
  3. Step 3: Cross multiply
    1,910.73x = 2,867.90 × 986.92
  4. Step 4: Simplify right side
    1,910.73x = 2,830,387.87
  5. Step 5: Solve for x
    x = 2,830,387.87/1,910.73
  6. Step 6: Final answer
    x = 1,481.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.