Home / 398,580.10-598,220.07-221,287.30

Finding the Fourth Proportional to 398,580.10, 598,220.07 and 221,287.30

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Solution

The fourth proportional to 398,580.10, 598,220.07 and 221,287.30 is: 332,125.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,580.10 : 598,220.07 = 221,287.30 : x
  2. Step 2: Convert to fraction form
    398,580.10/598,220.07 = 221,287.30/x
  3. Step 3: Cross multiply
    398,580.10x = 598,220.07 × 221,287.30
  4. Step 4: Simplify right side
    398,580.10x = 132,378,504,096.11
  5. Step 5: Solve for x
    x = 132,378,504,096.11/398,580.10
  6. Step 6: Final answer
    x = 332,125.22

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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.