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Finding the Fourth Proportional to 408,091.60, 612,137.40 and 347,730.40

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Solution

The fourth proportional to 408,091.60, 612,137.40 and 347,730.40 is: 521,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,091.60 : 612,137.40 = 347,730.40 : x
  2. Step 2: Convert to fraction form
    408,091.60/612,137.40 = 347,730.40/x
  3. Step 3: Cross multiply
    408,091.60x = 612,137.40 × 347,730.40
  4. Step 4: Simplify right side
    408,091.60x = 212,858,782,956.96
  5. Step 5: Solve for x
    x = 212,858,782,956.96/408,091.60
  6. Step 6: Final answer
    x = 521,595.60

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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.