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Finding the Fourth Proportional to 1,351.82, 1,865.79 and 792.58

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Solution

The fourth proportional to 1,351.82, 1,865.79 and 792.58 is: 1,093.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.82 : 1,865.79 = 792.58 : x
  2. Step 2: Convert to fraction form
    1,351.82/1,865.79 = 792.58/x
  3. Step 3: Cross multiply
    1,351.82x = 1,865.79 × 792.58
  4. Step 4: Simplify right side
    1,351.82x = 1,478,787.84
  5. Step 5: Solve for x
    x = 1,478,787.84/1,351.82
  6. Step 6: Final answer
    x = 1,093.92

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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.