Home / 609,086.20-913,629.30-420,129.40

Finding the Fourth Proportional to 609,086.20, 913,629.30 and 420,129.40

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Solution

The fourth proportional to 609,086.20, 913,629.30 and 420,129.40 is: 630,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,086.20 : 913,629.30 = 420,129.40 : x
  2. Step 2: Convert to fraction form
    609,086.20/913,629.30 = 420,129.40/x
  3. Step 3: Cross multiply
    609,086.20x = 913,629.30 × 420,129.40
  4. Step 4: Simplify right side
    609,086.20x = 383,842,529,631.42
  5. Step 5: Solve for x
    x = 383,842,529,631.42/609,086.20
  6. Step 6: Final answer
    x = 630,194.10

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Similar ratio
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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.