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Finding the Fourth Proportional to 393,620.80, 590,431.20 and 360,961.60

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Solution

The fourth proportional to 393,620.80, 590,431.20 and 360,961.60 is: 541,442.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,620.80 : 590,431.20 = 360,961.60 : x
  2. Step 2: Convert to fraction form
    393,620.80/590,431.20 = 360,961.60/x
  3. Step 3: Cross multiply
    393,620.80x = 590,431.20 × 360,961.60
  4. Step 4: Simplify right side
    393,620.80x = 213,122,990,641.92
  5. Step 5: Solve for x
    x = 213,122,990,641.92/393,620.80
  6. Step 6: Final answer
    x = 541,442.40

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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.