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Finding the Fourth Proportional to 618,840, 853,999.20 and 350,568

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Solution

The fourth proportional to 618,840, 853,999.20 and 350,568 is: 483,783.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,840 : 853,999.20 = 350,568 : x
  2. Step 2: Convert to fraction form
    618,840/853,999.20 = 350,568/x
  3. Step 3: Cross multiply
    618,840x = 853,999.20 × 350,568
  4. Step 4: Simplify right side
    618,840x = 299,384,791,545.60
  5. Step 5: Solve for x
    x = 299,384,791,545.60/618,840
  6. Step 6: Final answer
    x = 483,783.84

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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.