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Finding the Fourth Proportional to 481,921.80, 722,007.90 and 392,692.20

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Solution

The fourth proportional to 481,921.80, 722,007.90 and 392,692.20 is: 588,325.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,921.80 : 722,007.90 = 392,692.20 : x
  2. Step 2: Convert to fraction form
    481,921.80/722,007.90 = 392,692.20/x
  3. Step 3: Cross multiply
    481,921.80x = 722,007.90 × 392,692.20
  4. Step 4: Simplify right side
    481,921.80x = 283,526,870,668.38
  5. Step 5: Solve for x
    x = 283,526,870,668.38/481,921.80
  6. Step 6: Final answer
    x = 588,325.47

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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.