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Finding the Fourth Proportional to 639,375.88, 882,275.90 and 352,877.51

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Solution

The fourth proportional to 639,375.88, 882,275.90 and 352,877.51 is: 486,936.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,375.88 : 882,275.90 = 352,877.51 : x
  2. Step 2: Convert to fraction form
    639,375.88/882,275.90 = 352,877.51/x
  3. Step 3: Cross multiply
    639,375.88x = 882,275.90 × 352,877.51
  4. Step 4: Simplify right side
    639,375.88x = 311,335,323,166.31
  5. Step 5: Solve for x
    x = 311,335,323,166.31/639,375.88
  6. Step 6: Final answer
    x = 486,936.30

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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.