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Finding the Fourth Proportional to 2,454.81, 3,682.16 and 811.11

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Solution

The fourth proportional to 2,454.81, 3,682.16 and 811.11 is: 1,216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,454.81 : 3,682.16 = 811.11 : x
  2. Step 2: Convert to fraction form
    2,454.81/3,682.16 = 811.11/x
  3. Step 3: Cross multiply
    2,454.81x = 3,682.16 × 811.11
  4. Step 4: Simplify right side
    2,454.81x = 2,986,649.59
  5. Step 5: Solve for x
    x = 2,986,649.59/2,454.81
  6. Step 6: Final answer
    x = 1,216.65

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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.