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Finding the Fourth Proportional to 693,630, 957,287.16 and 391,843.44

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Solution

The fourth proportional to 693,630, 957,287.16 and 391,843.44 is: 540,787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,630 : 957,287.16 = 391,843.44 : x
  2. Step 2: Convert to fraction form
    693,630/957,287.16 = 391,843.44/x
  3. Step 3: Cross multiply
    693,630x = 957,287.16 × 391,843.44
  4. Step 4: Simplify right side
    693,630x = 375,106,693,842.23
  5. Step 5: Solve for x
    x = 375,106,693,842.23/693,630
  6. Step 6: Final answer
    x = 540,787.88

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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.