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Finding the Fourth Proportional to 639,514.93, 882,507.47 and 353,028.87

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Solution

The fourth proportional to 639,514.93, 882,507.47 and 353,028.87 is: 487,167.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,514.93 : 882,507.47 = 353,028.87 : x
  2. Step 2: Convert to fraction form
    639,514.93/882,507.47 = 353,028.87/x
  3. Step 3: Cross multiply
    639,514.93x = 882,507.47 × 353,028.87
  4. Step 4: Simplify right side
    639,514.93x = 311,550,610,488.12
  5. Step 5: Solve for x
    x = 311,550,610,488.12/639,514.93
  6. Step 6: Final answer
    x = 487,167.06

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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.