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Finding the Fourth Proportional to 399,640.44, 599,488.02 and 133,390.20

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Solution

The fourth proportional to 399,640.44, 599,488.02 and 133,390.20 is: 200,094.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,640.44 : 599,488.02 = 133,390.20 : x
  2. Step 2: Convert to fraction form
    399,640.44/599,488.02 = 133,390.20/x
  3. Step 3: Cross multiply
    399,640.44x = 599,488.02 × 133,390.20
  4. Step 4: Simplify right side
    399,640.44x = 79,965,826,885.40
  5. Step 5: Solve for x
    x = 79,965,826,885.40/399,640.44
  6. Step 6: Final answer
    x = 200,094.43

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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.