Home / 1,911.21-2,635.79-1,379.96

Finding the Fourth Proportional to 1,911.21, 2,635.79 and 1,379.96

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Solution

The fourth proportional to 1,911.21, 2,635.79 and 1,379.96 is: 1,903.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.21 : 2,635.79 = 1,379.96 : x
  2. Step 2: Convert to fraction form
    1,911.21/2,635.79 = 1,379.96/x
  3. Step 3: Cross multiply
    1,911.21x = 2,635.79 × 1,379.96
  4. Step 4: Simplify right side
    1,911.21x = 3,637,271.59
  5. Step 5: Solve for x
    x = 3,637,271.59/1,911.21
  6. Step 6: Final answer
    x = 1,903.13

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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.