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Finding the Fourth Proportional to 543,637.20, 815,455.80 and 331,060.80

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Solution

The fourth proportional to 543,637.20, 815,455.80 and 331,060.80 is: 496,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,637.20 : 815,455.80 = 331,060.80 : x
  2. Step 2: Convert to fraction form
    543,637.20/815,455.80 = 331,060.80/x
  3. Step 3: Cross multiply
    543,637.20x = 815,455.80 × 331,060.80
  4. Step 4: Simplify right side
    543,637.20x = 269,965,449,512.64
  5. Step 5: Solve for x
    x = 269,965,449,512.64/543,637.20
  6. Step 6: Final answer
    x = 496,591.20

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Similar ratio
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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.