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Finding the Fourth Proportional to 408,071.60, 612,107.40 and 342,753.20

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Solution

The fourth proportional to 408,071.60, 612,107.40 and 342,753.20 is: 514,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,071.60 : 612,107.40 = 342,753.20 : x
  2. Step 2: Convert to fraction form
    408,071.60/612,107.40 = 342,753.20/x
  3. Step 3: Cross multiply
    408,071.60x = 612,107.40 × 342,753.20
  4. Step 4: Simplify right side
    408,071.60x = 209,801,770,093.68
  5. Step 5: Solve for x
    x = 209,801,770,093.68/408,071.60
  6. Step 6: Final answer
    x = 514,129.80

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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.