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Finding the Fourth Proportional to 393,907.20, 590,169.60 and 323,404.80

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Solution

The fourth proportional to 393,907.20, 590,169.60 and 323,404.80 is: 484,539.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,907.20 : 590,169.60 = 323,404.80 : x
  2. Step 2: Convert to fraction form
    393,907.20/590,169.60 = 323,404.80/x
  3. Step 3: Cross multiply
    393,907.20x = 590,169.60 × 323,404.80
  4. Step 4: Simplify right side
    393,907.20x = 190,863,681,454.08
  5. Step 5: Solve for x
    x = 190,863,681,454.08/393,907.20
  6. Step 6: Final answer
    x = 484,539.71

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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.