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Finding the Fourth Proportional to 639,503.35, 882,514.77 and 353,023.63

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Solution

The fourth proportional to 639,503.35, 882,514.77 and 353,023.63 is: 487,172.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,503.35 : 882,514.77 = 353,023.63 : x
  2. Step 2: Convert to fraction form
    639,503.35/882,514.77 = 353,023.63/x
  3. Step 3: Cross multiply
    639,503.35x = 882,514.77 × 353,023.63
  4. Step 4: Simplify right side
    639,503.35x = 311,548,567,634.02
  5. Step 5: Solve for x
    x = 311,548,567,634.02/639,503.35
  6. Step 6: Final answer
    x = 487,172.69

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Double scale
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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.