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Finding the Fourth Proportional to 519,343.11, 780,384.58 and 279,634.28

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Solution

The fourth proportional to 519,343.11, 780,384.58 and 279,634.28 is: 420,189.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,343.11 : 780,384.58 = 279,634.28 : x
  2. Step 2: Convert to fraction form
    519,343.11/780,384.58 = 279,634.28/x
  3. Step 3: Cross multiply
    519,343.11x = 780,384.58 × 279,634.28
  4. Step 4: Simplify right side
    519,343.11x = 218,222,275,550.39
  5. Step 5: Solve for x
    x = 218,222,275,550.39/519,343.11
  6. Step 6: Final answer
    x = 420,189.03

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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.