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Finding the Fourth Proportional to 408,279.45, 612,338.97 and 388,025.82

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Solution

The fourth proportional to 408,279.45, 612,338.97 and 388,025.82 is: 581,962.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,279.45 : 612,338.97 = 388,025.82 : x
  2. Step 2: Convert to fraction form
    408,279.45/612,338.97 = 388,025.82/x
  3. Step 3: Cross multiply
    408,279.45x = 612,338.97 × 388,025.82
  4. Step 4: Simplify right side
    408,279.45x = 237,603,330,952.21
  5. Step 5: Solve for x
    x = 237,603,330,952.21/408,279.45
  6. Step 6: Final answer
    x = 581,962.50

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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.