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Finding the Fourth Proportional to 538,715.30, 806,906.55 and 445,403.30

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Solution

The fourth proportional to 538,715.30, 806,906.55 and 445,403.30 is: 667,140.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,715.30 : 806,906.55 = 445,403.30 : x
  2. Step 2: Convert to fraction form
    538,715.30/806,906.55 = 445,403.30/x
  3. Step 3: Cross multiply
    538,715.30x = 806,906.55 × 445,403.30
  4. Step 4: Simplify right side
    538,715.30x = 359,398,840,161.62
  5. Step 5: Solve for x
    x = 359,398,840,161.62/538,715.30
  6. Step 6: Final answer
    x = 667,140.58

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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.