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Finding the Fourth Proportional to 543,639.70, 815,459.55 and 331,063.30

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Solution

The fourth proportional to 543,639.70, 815,459.55 and 331,063.30 is: 496,594.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,639.70 : 815,459.55 = 331,063.30 : x
  2. Step 2: Convert to fraction form
    543,639.70/815,459.55 = 331,063.30/x
  3. Step 3: Cross multiply
    543,639.70x = 815,459.55 × 331,063.30
  4. Step 4: Simplify right side
    543,639.70x = 269,968,729,639.52
  5. Step 5: Solve for x
    x = 269,968,729,639.52/543,639.70
  6. Step 6: Final answer
    x = 496,594.95

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Similar ratio
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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.