Home / 398,579.85-598,219.70-221,287.05

Finding the Fourth Proportional to 398,579.85, 598,219.70 and 221,287.05

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Solution

The fourth proportional to 398,579.85, 598,219.70 and 221,287.05 is: 332,124.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,579.85 : 598,219.70 = 221,287.05 : x
  2. Step 2: Convert to fraction form
    398,579.85/598,219.70 = 221,287.05/x
  3. Step 3: Cross multiply
    398,579.85x = 598,219.70 × 221,287.05
  4. Step 4: Simplify right side
    398,579.85x = 132,378,271,558.45
  5. Step 5: Solve for x
    x = 132,378,271,558.45/398,579.85
  6. Step 6: Final answer
    x = 332,124.85

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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.