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Finding the Fourth Proportional to 608,519.80, 839,477.94 and 393,729.88

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Solution

The fourth proportional to 608,519.80, 839,477.94 and 393,729.88 is: 543,166.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,519.80 : 839,477.94 = 393,729.88 : x
  2. Step 2: Convert to fraction form
    608,519.80/839,477.94 = 393,729.88/x
  3. Step 3: Cross multiply
    608,519.80x = 839,477.94 × 393,729.88
  4. Step 4: Simplify right side
    608,519.80x = 330,527,548,578.85
  5. Step 5: Solve for x
    x = 330,527,548,578.85/608,519.80
  6. Step 6: Final answer
    x = 543,166.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.