Home / 3,221.40-4,823.46-1,921.08

Finding the Fourth Proportional to 3,221.40, 4,823.46 and 1,921.08

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Solution

The fourth proportional to 3,221.40, 4,823.46 and 1,921.08 is: 2,876.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.40 : 4,823.46 = 1,921.08 : x
  2. Step 2: Convert to fraction form
    3,221.40/4,823.46 = 1,921.08/x
  3. Step 3: Cross multiply
    3,221.40x = 4,823.46 × 1,921.08
  4. Step 4: Simplify right side
    3,221.40x = 9,266,252.54
  5. Step 5: Solve for x
    x = 9,266,252.54/3,221.40
  6. Step 6: Final answer
    x = 2,876.47

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1.5x scale

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.