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Finding the Fourth Proportional to 407,939.20, 611,311.20 and 365,819.20

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Solution

The fourth proportional to 407,939.20, 611,311.20 and 365,819.20 is: 548,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,939.20 : 611,311.20 = 365,819.20 : x
  2. Step 2: Convert to fraction form
    407,939.20/611,311.20 = 365,819.20/x
  3. Step 3: Cross multiply
    407,939.20x = 611,311.20 × 365,819.20
  4. Step 4: Simplify right side
    407,939.20x = 223,629,374,135.04
  5. Step 5: Solve for x
    x = 223,629,374,135.04/407,939.20
  6. Step 6: Final answer
    x = 548,192.90

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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.