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Finding the Fourth Proportional to 639,432.84, 882,417.36 and 352,953

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Solution

The fourth proportional to 639,432.84, 882,417.36 and 352,953 is: 487,075.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,432.84 : 882,417.36 = 352,953 : x
  2. Step 2: Convert to fraction form
    639,432.84/882,417.36 = 352,953/x
  3. Step 3: Cross multiply
    639,432.84x = 882,417.36 × 352,953
  4. Step 4: Simplify right side
    639,432.84x = 311,451,854,464.08
  5. Step 5: Solve for x
    x = 311,451,854,464.08/639,432.84
  6. Step 6: Final answer
    x = 487,075.16

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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.