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Finding the Fourth Proportional to 388,936.40, 582,713.40 and 333,640.40

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Solution

The fourth proportional to 388,936.40, 582,713.40 and 333,640.40 is: 499,867.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,936.40 : 582,713.40 = 333,640.40 : x
  2. Step 2: Convert to fraction form
    388,936.40/582,713.40 = 333,640.40/x
  3. Step 3: Cross multiply
    388,936.40x = 582,713.40 × 333,640.40
  4. Step 4: Simplify right side
    388,936.40x = 194,416,731,861.36
  5. Step 5: Solve for x
    x = 194,416,731,861.36/388,936.40
  6. Step 6: Final answer
    x = 499,867.67

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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.