Home / 2,811.21-4,215.60-1,642.38

Finding the Fourth Proportional to 2,811.21, 4,215.60 and 1,642.38

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Solution

The fourth proportional to 2,811.21, 4,215.60 and 1,642.38 is: 2,462.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.21 : 4,215.60 = 1,642.38 : x
  2. Step 2: Convert to fraction form
    2,811.21/4,215.60 = 1,642.38/x
  3. Step 3: Cross multiply
    2,811.21x = 4,215.60 × 1,642.38
  4. Step 4: Simplify right side
    2,811.21x = 6,923,617.13
  5. Step 5: Solve for x
    x = 6,923,617.13/2,811.21
  6. Step 6: Final answer
    x = 2,462.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.