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Finding the Fourth Proportional to 479,604.52, 719,406.30 and 142,643.80

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Solution

The fourth proportional to 479,604.52, 719,406.30 and 142,643.80 is: 213,965.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,604.52 : 719,406.30 = 142,643.80 : x
  2. Step 2: Convert to fraction form
    479,604.52/719,406.30 = 142,643.80/x
  3. Step 3: Cross multiply
    479,604.52x = 719,406.30 × 142,643.80
  4. Step 4: Simplify right side
    479,604.52x = 102,618,848,375.94
  5. Step 5: Solve for x
    x = 102,618,848,375.94/479,604.52
  6. Step 6: Final answer
    x = 213,965.56

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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.