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Finding the Fourth Proportional to 615,608.20, 922,893.90 and 320,120.20

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Solution

The fourth proportional to 615,608.20, 922,893.90 and 320,120.20 is: 479,910.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,608.20 : 922,893.90 = 320,120.20 : x
  2. Step 2: Convert to fraction form
    615,608.20/922,893.90 = 320,120.20/x
  3. Step 3: Cross multiply
    615,608.20x = 922,893.90 × 320,120.20
  4. Step 4: Simplify right side
    615,608.20x = 295,436,979,846.78
  5. Step 5: Solve for x
    x = 295,436,979,846.78/615,608.20
  6. Step 6: Final answer
    x = 479,910.73

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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.