Home / 1,811.45-2,729.35-1,638.31

Finding the Fourth Proportional to 1,811.45, 2,729.35 and 1,638.31

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Solution

The fourth proportional to 1,811.45, 2,729.35 and 1,638.31 is: 2,468.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.45 : 2,729.35 = 1,638.31 : x
  2. Step 2: Convert to fraction form
    1,811.45/2,729.35 = 1,638.31/x
  3. Step 3: Cross multiply
    1,811.45x = 2,729.35 × 1,638.31
  4. Step 4: Simplify right side
    1,811.45x = 4,471,521.40
  5. Step 5: Solve for x
    x = 4,471,521.40/1,811.45
  6. Step 6: Final answer
    x = 2,468.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.