Home / 639,928.20-959,892.30-219,149.40

Finding the Fourth Proportional to 639,928.20, 959,892.30 and 219,149.40

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Solution

The fourth proportional to 639,928.20, 959,892.30 and 219,149.40 is: 328,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,928.20 : 959,892.30 = 219,149.40 : x
  2. Step 2: Convert to fraction form
    639,928.20/959,892.30 = 219,149.40/x
  3. Step 3: Cross multiply
    639,928.20x = 959,892.30 × 219,149.40
  4. Step 4: Simplify right side
    639,928.20x = 210,359,821,609.62
  5. Step 5: Solve for x
    x = 210,359,821,609.62/639,928.20
  6. Step 6: Final answer
    x = 328,724.10

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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.