Home / 1,987.84-2,742.82-1,201.94

Finding the Fourth Proportional to 1,987.84, 2,742.82 and 1,201.94

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Solution

The fourth proportional to 1,987.84, 2,742.82 and 1,201.94 is: 1,658.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.84 : 2,742.82 = 1,201.94 : x
  2. Step 2: Convert to fraction form
    1,987.84/2,742.82 = 1,201.94/x
  3. Step 3: Cross multiply
    1,987.84x = 2,742.82 × 1,201.94
  4. Step 4: Simplify right side
    1,987.84x = 3,296,705.07
  5. Step 5: Solve for x
    x = 3,296,705.07/1,987.84
  6. Step 6: Final answer
    x = 1,658.44

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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.