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Finding the Fourth Proportional to 543,611.20, 815,416.80 and 492,872.80

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Solution

The fourth proportional to 543,611.20, 815,416.80 and 492,872.80 is: 739,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,611.20 : 815,416.80 = 492,872.80 : x
  2. Step 2: Convert to fraction form
    543,611.20/815,416.80 = 492,872.80/x
  3. Step 3: Cross multiply
    543,611.20x = 815,416.80 × 492,872.80
  4. Step 4: Simplify right side
    543,611.20x = 401,896,761,383.04
  5. Step 5: Solve for x
    x = 401,896,761,383.04/543,611.20
  6. Step 6: Final answer
    x = 739,309.20

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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.