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Finding the Fourth Proportional to 408,360.60, 612,540.90 and 349,311.60

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Solution

The fourth proportional to 408,360.60, 612,540.90 and 349,311.60 is: 523,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,360.60 : 612,540.90 = 349,311.60 : x
  2. Step 2: Convert to fraction form
    408,360.60/612,540.90 = 349,311.60/x
  3. Step 3: Cross multiply
    408,360.60x = 612,540.90 × 349,311.60
  4. Step 4: Simplify right side
    408,360.60x = 213,967,641,844.44
  5. Step 5: Solve for x
    x = 213,967,641,844.44/408,360.60
  6. Step 6: Final answer
    x = 523,967.40

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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.