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Finding the Fourth Proportional to 543,208.80, 815,427.60 and 321,717.60

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Solution

The fourth proportional to 543,208.80, 815,427.60 and 321,717.60 is: 482,940.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,208.80 : 815,427.60 = 321,717.60 : x
  2. Step 2: Convert to fraction form
    543,208.80/815,427.60 = 321,717.60/x
  3. Step 3: Cross multiply
    543,208.80x = 815,427.60 × 321,717.60
  4. Step 4: Simplify right side
    543,208.80x = 262,337,410,445.76
  5. Step 5: Solve for x
    x = 262,337,410,445.76/543,208.80
  6. Step 6: Final answer
    x = 482,940.28

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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.