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Finding the Fourth Proportional to 538,711.80, 806,901.30 and 445,399.80

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Solution

The fourth proportional to 538,711.80, 806,901.30 and 445,399.80 is: 667,135.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,711.80 : 806,901.30 = 445,399.80 : x
  2. Step 2: Convert to fraction form
    538,711.80/806,901.30 = 445,399.80/x
  3. Step 3: Cross multiply
    538,711.80x = 806,901.30 × 445,399.80
  4. Step 4: Simplify right side
    538,711.80x = 359,393,677,639.74
  5. Step 5: Solve for x
    x = 359,393,677,639.74/538,711.80
  6. Step 6: Final answer
    x = 667,135.34

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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.