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Finding the Fourth Proportional to 543,241.80, 815,477.10 and 321,750.60

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Solution

The fourth proportional to 543,241.80, 815,477.10 and 321,750.60 is: 482,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,241.80 : 815,477.10 = 321,750.60 : x
  2. Step 2: Convert to fraction form
    543,241.80/815,477.10 = 321,750.60/x
  3. Step 3: Cross multiply
    543,241.80x = 815,477.10 × 321,750.60
  4. Step 4: Simplify right side
    543,241.80x = 262,380,246,211.26
  5. Step 5: Solve for x
    x = 262,380,246,211.26/543,241.80
  6. Step 6: Final answer
    x = 482,989.80

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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.