Home / 1,985.84-2,738.57-1,321.54

Finding the Fourth Proportional to 1,985.84, 2,738.57 and 1,321.54

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Solution

The fourth proportional to 1,985.84, 2,738.57 and 1,321.54 is: 1,822.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.84 : 2,738.57 = 1,321.54 : x
  2. Step 2: Convert to fraction form
    1,985.84/2,738.57 = 1,321.54/x
  3. Step 3: Cross multiply
    1,985.84x = 2,738.57 × 1,321.54
  4. Step 4: Simplify right side
    1,985.84x = 3,619,129.80
  5. Step 5: Solve for x
    x = 3,619,129.80/1,985.84
  6. Step 6: Final answer
    x = 1,822.47

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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.