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Finding the Fourth Proportional to 398,003.40, 595,692.90 and 279,905.40

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Solution

The fourth proportional to 398,003.40, 595,692.90 and 279,905.40 is: 418,935.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,003.40 : 595,692.90 = 279,905.40 : x
  2. Step 2: Convert to fraction form
    398,003.40/595,692.90 = 279,905.40/x
  3. Step 3: Cross multiply
    398,003.40x = 595,692.90 × 279,905.40
  4. Step 4: Simplify right side
    398,003.40x = 166,737,659,451.66
  5. Step 5: Solve for x
    x = 166,737,659,451.66/398,003.40
  6. Step 6: Final answer
    x = 418,935.26

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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.