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Finding the Fourth Proportional to 641,714.40, 885,287.88 and 386,924.04

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Solution

The fourth proportional to 641,714.40, 885,287.88 and 386,924.04 is: 533,787.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,714.40 : 885,287.88 = 386,924.04 : x
  2. Step 2: Convert to fraction form
    641,714.40/885,287.88 = 386,924.04/x
  3. Step 3: Cross multiply
    641,714.40x = 885,287.88 × 386,924.04
  4. Step 4: Simplify right side
    641,714.40x = 342,539,163,092.64
  5. Step 5: Solve for x
    x = 342,539,163,092.64/641,714.40
  6. Step 6: Final answer
    x = 533,787.56

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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.