Home / 1,991.73-2,739.45-1,597.89

Finding the Fourth Proportional to 1,991.73, 2,739.45 and 1,597.89

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Solution

The fourth proportional to 1,991.73, 2,739.45 and 1,597.89 is: 2,197.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.73 : 2,739.45 = 1,597.89 : x
  2. Step 2: Convert to fraction form
    1,991.73/2,739.45 = 1,597.89/x
  3. Step 3: Cross multiply
    1,991.73x = 2,739.45 × 1,597.89
  4. Step 4: Simplify right side
    1,991.73x = 4,377,339.76
  5. Step 5: Solve for x
    x = 4,377,339.76/1,991.73
  6. Step 6: Final answer
    x = 2,197.76

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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.