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Finding the Fourth Proportional to 639,514.68, 882,507.13 and 353,028.62

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Solution

The fourth proportional to 639,514.68, 882,507.13 and 353,028.62 is: 487,166.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,514.68 : 882,507.13 = 353,028.62 : x
  2. Step 2: Convert to fraction form
    639,514.68/882,507.13 = 353,028.62/x
  3. Step 3: Cross multiply
    639,514.68x = 882,507.13 × 353,028.62
  4. Step 4: Simplify right side
    639,514.68x = 311,550,268,066.38
  5. Step 5: Solve for x
    x = 311,550,268,066.38/639,514.68
  6. Step 6: Final answer
    x = 487,166.72

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Half scale
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Double scale
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Similar ratio
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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.