Home / 398,579.10-598,218.57-221,286.30

Finding the Fourth Proportional to 398,579.10, 598,218.57 and 221,286.30

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Solution

The fourth proportional to 398,579.10, 598,218.57 and 221,286.30 is: 332,123.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,579.10 : 598,218.57 = 221,286.30 : x
  2. Step 2: Convert to fraction form
    398,579.10/598,218.57 = 221,286.30/x
  3. Step 3: Cross multiply
    398,579.10x = 598,218.57 × 221,286.30
  4. Step 4: Simplify right side
    398,579.10x = 132,377,573,946.59
  5. Step 5: Solve for x
    x = 132,377,573,946.59/398,579.10
  6. Step 6: Final answer
    x = 332,123.72

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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.