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Finding the Fourth Proportional to 408,000.60, 612,000.90 and 197,659.80

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Solution

The fourth proportional to 408,000.60, 612,000.90 and 197,659.80 is: 296,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,000.60 : 612,000.90 = 197,659.80 : x
  2. Step 2: Convert to fraction form
    408,000.60/612,000.90 = 197,659.80/x
  3. Step 3: Cross multiply
    408,000.60x = 612,000.90 × 197,659.80
  4. Step 4: Simplify right side
    408,000.60x = 120,967,975,493.82
  5. Step 5: Solve for x
    x = 120,967,975,493.82/408,000.60
  6. Step 6: Final answer
    x = 296,489.70

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1.5x scale

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.