Home / 3,215.30-4,438.56-1,889.09

Finding the Fourth Proportional to 3,215.30, 4,438.56 and 1,889.09

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Solution

The fourth proportional to 3,215.30, 4,438.56 and 1,889.09 is: 2,607.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.30 : 4,438.56 = 1,889.09 : x
  2. Step 2: Convert to fraction form
    3,215.30/4,438.56 = 1,889.09/x
  3. Step 3: Cross multiply
    3,215.30x = 4,438.56 × 1,889.09
  4. Step 4: Simplify right side
    3,215.30x = 8,384,839.31
  5. Step 5: Solve for x
    x = 8,384,839.31/3,215.30
  6. Step 6: Final answer
    x = 2,607.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.