Home / 3,231.78-4,461.48-2,189.40

Finding the Fourth Proportional to 3,231.78, 4,461.48 and 2,189.40

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Solution

The fourth proportional to 3,231.78, 4,461.48 and 2,189.40 is: 3,022.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,231.78 : 4,461.48 = 2,189.40 : x
  2. Step 2: Convert to fraction form
    3,231.78/4,461.48 = 2,189.40/x
  3. Step 3: Cross multiply
    3,231.78x = 4,461.48 × 2,189.40
  4. Step 4: Simplify right side
    3,231.78x = 9,767,964.31
  5. Step 5: Solve for x
    x = 9,767,964.31/3,231.78
  6. Step 6: Final answer
    x = 3,022.47

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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.