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Finding the Fourth Proportional to 1,395.33, 1,925.46 and 765.82

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Solution

The fourth proportional to 1,395.33, 1,925.46 and 765.82 is: 1,056.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.33 : 1,925.46 = 765.82 : x
  2. Step 2: Convert to fraction form
    1,395.33/1,925.46 = 765.82/x
  3. Step 3: Cross multiply
    1,395.33x = 1,925.46 × 765.82
  4. Step 4: Simplify right side
    1,395.33x = 1,474,555.78
  5. Step 5: Solve for x
    x = 1,474,555.78/1,395.33
  6. Step 6: Final answer
    x = 1,056.78

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.