Home / 1,985.21-2,738.80-1,276.94

Finding the Fourth Proportional to 1,985.21, 2,738.80 and 1,276.94

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Solution

The fourth proportional to 1,985.21, 2,738.80 and 1,276.94 is: 1,761.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.21 : 2,738.80 = 1,276.94 : x
  2. Step 2: Convert to fraction form
    1,985.21/2,738.80 = 1,276.94/x
  3. Step 3: Cross multiply
    1,985.21x = 2,738.80 × 1,276.94
  4. Step 4: Simplify right side
    1,985.21x = 3,497,283.27
  5. Step 5: Solve for x
    x = 3,497,283.27/1,985.21
  6. Step 6: Final answer
    x = 1,761.67

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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.