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Finding the Fourth Proportional to 543,998.40, 815,997.60 and 343,669.20

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Solution

The fourth proportional to 543,998.40, 815,997.60 and 343,669.20 is: 515,503.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,998.40 : 815,997.60 = 343,669.20 : x
  2. Step 2: Convert to fraction form
    543,998.40/815,997.60 = 343,669.20/x
  3. Step 3: Cross multiply
    543,998.40x = 815,997.60 × 343,669.20
  4. Step 4: Simplify right side
    543,998.40x = 280,433,242,393.92
  5. Step 5: Solve for x
    x = 280,433,242,393.92/543,998.40
  6. Step 6: Final answer
    x = 515,503.80

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1.5x scale

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.