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Finding the Fourth Proportional to 538,910.20, 807,846.90 and 418,900.60

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Solution

The fourth proportional to 538,910.20, 807,846.90 and 418,900.60 is: 627,947.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,910.20 : 807,846.90 = 418,900.60 : x
  2. Step 2: Convert to fraction form
    538,910.20/807,846.90 = 418,900.60/x
  3. Step 3: Cross multiply
    538,910.20x = 807,846.90 × 418,900.60
  4. Step 4: Simplify right side
    538,910.20x = 338,407,551,118.14
  5. Step 5: Solve for x
    x = 338,407,551,118.14/538,910.20
  6. Step 6: Final answer
    x = 627,947.94

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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.