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Finding the Fourth Proportional to 639,535.49, 882,561.80 and 353,057.93

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Solution

The fourth proportional to 639,535.49, 882,561.80 and 353,057.93 is: 487,221.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,535.49 : 882,561.80 = 353,057.93 : x
  2. Step 2: Convert to fraction form
    639,535.49/882,561.80 = 353,057.93/x
  3. Step 3: Cross multiply
    639,535.49x = 882,561.80 × 353,057.93
  4. Step 4: Simplify right side
    639,535.49x = 311,595,442,205.07
  5. Step 5: Solve for x
    x = 311,595,442,205.07/639,535.49
  6. Step 6: Final answer
    x = 487,221.50

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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.