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Finding the Fourth Proportional to 285,387.20, 428,145.60 and 166,997.60

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Solution

The fourth proportional to 285,387.20, 428,145.60 and 166,997.60 is: 250,534.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,387.20 : 428,145.60 = 166,997.60 : x
  2. Step 2: Convert to fraction form
    285,387.20/428,145.60 = 166,997.60/x
  3. Step 3: Cross multiply
    285,387.20x = 428,145.60 × 166,997.60
  4. Step 4: Simplify right side
    285,387.20x = 71,499,287,650.56
  5. Step 5: Solve for x
    x = 71,499,287,650.56/285,387.20
  6. Step 6: Final answer
    x = 250,534.32

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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.