Home / 639,591.09-882,633.25-353,109.12

Finding the Fourth Proportional to 639,591.09, 882,633.25 and 353,109.12

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Solution

The fourth proportional to 639,591.09, 882,633.25 and 353,109.12 is: 487,289.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,591.09 : 882,633.25 = 353,109.12 : x
  2. Step 2: Convert to fraction form
    639,591.09/882,633.25 = 353,109.12/x
  3. Step 3: Cross multiply
    639,591.09x = 882,633.25 × 353,109.12
  4. Step 4: Simplify right side
    639,591.09x = 311,665,847,321.75
  5. Step 5: Solve for x
    x = 311,665,847,321.75/639,591.09
  6. Step 6: Final answer
    x = 487,289.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.