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Finding the Fourth Proportional to 1,178.83, 1,627.89 and 759.92

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Solution

The fourth proportional to 1,178.83, 1,627.89 and 759.92 is: 1,049.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.83 : 1,627.89 = 759.92 : x
  2. Step 2: Convert to fraction form
    1,178.83/1,627.89 = 759.92/x
  3. Step 3: Cross multiply
    1,178.83x = 1,627.89 × 759.92
  4. Step 4: Simplify right side
    1,178.83x = 1,237,066.17
  5. Step 5: Solve for x
    x = 1,237,066.17/1,178.83
  6. Step 6: Final answer
    x = 1,049.40

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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.