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Finding the Fourth Proportional to 3,258.60, 4,891.80 and 1,872.90

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Solution

The fourth proportional to 3,258.60, 4,891.80 and 1,872.90 is: 2,811.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,258.60 : 4,891.80 = 1,872.90 : x
  2. Step 2: Convert to fraction form
    3,258.60/4,891.80 = 1,872.90/x
  3. Step 3: Cross multiply
    3,258.60x = 4,891.80 × 1,872.90
  4. Step 4: Simplify right side
    3,258.60x = 9,161,852.22
  5. Step 5: Solve for x
    x = 9,161,852.22/3,258.60
  6. Step 6: Final answer
    x = 2,811.59

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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.