Home / 639,334.20-957,311.70-512,383.80

Finding the Fourth Proportional to 639,334.20, 957,311.70 and 512,383.80

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Solution

The fourth proportional to 639,334.20, 957,311.70 and 512,383.80 is: 767,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,334.20 : 957,311.70 = 512,383.80 : x
  2. Step 2: Convert to fraction form
    639,334.20/957,311.70 = 512,383.80/x
  3. Step 3: Cross multiply
    639,334.20x = 957,311.70 × 512,383.80
  4. Step 4: Simplify right side
    639,334.20x = 490,511,006,630.46
  5. Step 5: Solve for x
    x = 490,511,006,630.46/639,334.20
  6. Step 6: Final answer
    x = 767,221.60

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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.