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Finding the Fourth Proportional to 2,454.80, 3,682.32 and 811.50

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Solution

The fourth proportional to 2,454.80, 3,682.32 and 811.50 is: 1,217.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,454.80 : 3,682.32 = 811.50 : x
  2. Step 2: Convert to fraction form
    2,454.80/3,682.32 = 811.50/x
  3. Step 3: Cross multiply
    2,454.80x = 3,682.32 × 811.50
  4. Step 4: Simplify right side
    2,454.80x = 2,988,202.68
  5. Step 5: Solve for x
    x = 2,988,202.68/2,454.80
  6. Step 6: Final answer
    x = 1,217.29

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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.