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Finding the Fourth Proportional to 618,668.28, 853,906.86 and 403,433.46

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Solution

The fourth proportional to 618,668.28, 853,906.86 and 403,433.46 is: 556,832.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,668.28 : 853,906.86 = 403,433.46 : x
  2. Step 2: Convert to fraction form
    618,668.28/853,906.86 = 403,433.46/x
  3. Step 3: Cross multiply
    618,668.28x = 853,906.86 × 403,433.46
  4. Step 4: Simplify right side
    618,668.28x = 344,494,599,047.54
  5. Step 5: Solve for x
    x = 344,494,599,047.54/618,668.28
  6. Step 6: Final answer
    x = 556,832.49

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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.