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Finding the Fourth Proportional to 639,674.43, 882,727.59 and 353,188.37

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Solution

The fourth proportional to 639,674.43, 882,727.59 and 353,188.37 is: 487,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,674.43 : 882,727.59 = 353,188.37 : x
  2. Step 2: Convert to fraction form
    639,674.43/882,727.59 = 353,188.37/x
  3. Step 3: Cross multiply
    639,674.43x = 882,727.59 × 353,188.37
  4. Step 4: Simplify right side
    639,674.43x = 311,769,118,666.13
  5. Step 5: Solve for x
    x = 311,769,118,666.13/639,674.43
  6. Step 6: Final answer
    x = 487,387.18

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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.