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Finding the Fourth Proportional to 306,736.80, 459,121.05 and 218,163.30

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Solution

The fourth proportional to 306,736.80, 459,121.05 and 218,163.30 is: 326,544.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,736.80 : 459,121.05 = 218,163.30 : x
  2. Step 2: Convert to fraction form
    306,736.80/459,121.05 = 218,163.30/x
  3. Step 3: Cross multiply
    306,736.80x = 459,121.05 × 218,163.30
  4. Step 4: Simplify right side
    306,736.80x = 100,163,363,367.47
  5. Step 5: Solve for x
    x = 100,163,363,367.47/306,736.80
  6. Step 6: Final answer
    x = 326,544.98

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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.