Home / 2,621.64-3,929.10-1,231.90

Finding the Fourth Proportional to 2,621.64, 3,929.10 and 1,231.90

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Solution

The fourth proportional to 2,621.64, 3,929.10 and 1,231.90 is: 1,846.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.64 : 3,929.10 = 1,231.90 : x
  2. Step 2: Convert to fraction form
    2,621.64/3,929.10 = 1,231.90/x
  3. Step 3: Cross multiply
    2,621.64x = 3,929.10 × 1,231.90
  4. Step 4: Simplify right side
    2,621.64x = 4,840,258.29
  5. Step 5: Solve for x
    x = 4,840,258.29/2,621.64
  6. Step 6: Final answer
    x = 1,846.27

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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.