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Finding the Fourth Proportional to 2,563.74, 3,845.20 and 714.66

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Solution

The fourth proportional to 2,563.74, 3,845.20 and 714.66 is: 1,071.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,563.74 : 3,845.20 = 714.66 : x
  2. Step 2: Convert to fraction form
    2,563.74/3,845.20 = 714.66/x
  3. Step 3: Cross multiply
    2,563.74x = 3,845.20 × 714.66
  4. Step 4: Simplify right side
    2,563.74x = 2,748,010.63
  5. Step 5: Solve for x
    x = 2,748,010.63/2,563.74
  6. Step 6: Final answer
    x = 1,071.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.