Home / 1,977.84-2,729.55-1,191.90

Finding the Fourth Proportional to 1,977.84, 2,729.55 and 1,191.90

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Solution

The fourth proportional to 1,977.84, 2,729.55 and 1,191.90 is: 1,644.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.84 : 2,729.55 = 1,191.90 : x
  2. Step 2: Convert to fraction form
    1,977.84/2,729.55 = 1,191.90/x
  3. Step 3: Cross multiply
    1,977.84x = 2,729.55 × 1,191.90
  4. Step 4: Simplify right side
    1,977.84x = 3,253,350.65
  5. Step 5: Solve for x
    x = 3,253,350.65/1,977.84
  6. Step 6: Final answer
    x = 1,644.90

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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.