Home / 2,029.20-2,801.79-1,311.81

Finding the Fourth Proportional to 2,029.20, 2,801.79 and 1,311.81

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Solution

The fourth proportional to 2,029.20, 2,801.79 and 1,311.81 is: 1,811.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,029.20 : 2,801.79 = 1,311.81 : x
  2. Step 2: Convert to fraction form
    2,029.20/2,801.79 = 1,311.81/x
  3. Step 3: Cross multiply
    2,029.20x = 2,801.79 × 1,311.81
  4. Step 4: Simplify right side
    2,029.20x = 3,675,411.22
  5. Step 5: Solve for x
    x = 3,675,411.22/2,029.20
  6. Step 6: Final answer
    x = 1,811.26

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1.5x scale

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.