Home / 398,834.89-550,399.64-217,553.30

Finding the Fourth Proportional to 398,834.89, 550,399.64 and 217,553.30

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Solution

The fourth proportional to 398,834.89, 550,399.64 and 217,553.30 is: 300,227.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,834.89 : 550,399.64 = 217,553.30 : x
  2. Step 2: Convert to fraction form
    398,834.89/550,399.64 = 217,553.30/x
  3. Step 3: Cross multiply
    398,834.89x = 550,399.64 × 217,553.30
  4. Step 4: Simplify right side
    398,834.89x = 119,741,258,000.81
  5. Step 5: Solve for x
    x = 119,741,258,000.81/398,834.89
  6. Step 6: Final answer
    x = 300,227.64

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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.