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Finding the Fourth Proportional to 639,665.16, 882,751.64 and 353,203.24

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Solution

The fourth proportional to 639,665.16, 882,751.64 and 353,203.24 is: 487,428.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,665.16 : 882,751.64 = 353,203.24 : x
  2. Step 2: Convert to fraction form
    639,665.16/882,751.64 = 353,203.24/x
  3. Step 3: Cross multiply
    639,665.16x = 882,751.64 × 353,203.24
  4. Step 4: Simplify right side
    639,665.16x = 311,790,739,363.31
  5. Step 5: Solve for x
    x = 311,790,739,363.31/639,665.16
  6. Step 6: Final answer
    x = 487,428.05

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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.