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Finding the Fourth Proportional to 538,715.80, 806,907.30 and 445,403.80

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Solution

The fourth proportional to 538,715.80, 806,907.30 and 445,403.80 is: 667,141.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,715.80 : 806,907.30 = 445,403.80 : x
  2. Step 2: Convert to fraction form
    538,715.80/806,907.30 = 445,403.80/x
  3. Step 3: Cross multiply
    538,715.80x = 806,907.30 × 445,403.80
  4. Step 4: Simplify right side
    538,715.80x = 359,399,577,667.74
  5. Step 5: Solve for x
    x = 359,399,577,667.74/538,715.80
  6. Step 6: Final answer
    x = 667,141.33

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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.