Home / 3,319.38-4,579.20-2,123.80

Finding the Fourth Proportional to 3,319.38, 4,579.20 and 2,123.80

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Solution

The fourth proportional to 3,319.38, 4,579.20 and 2,123.80 is: 2,929.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.38 : 4,579.20 = 2,123.80 : x
  2. Step 2: Convert to fraction form
    3,319.38/4,579.20 = 2,123.80/x
  3. Step 3: Cross multiply
    3,319.38x = 4,579.20 × 2,123.80
  4. Step 4: Simplify right side
    3,319.38x = 9,725,304.96
  5. Step 5: Solve for x
    x = 9,725,304.96/3,319.38
  6. Step 6: Final answer
    x = 2,929.86

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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.