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Finding the Fourth Proportional to 3,356.78, 5,036.88 and 1,383.92

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Solution

The fourth proportional to 3,356.78, 5,036.88 and 1,383.92 is: 2,076.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,356.78 : 5,036.88 = 1,383.92 : x
  2. Step 2: Convert to fraction form
    3,356.78/5,036.88 = 1,383.92/x
  3. Step 3: Cross multiply
    3,356.78x = 5,036.88 × 1,383.92
  4. Step 4: Simplify right side
    3,356.78x = 6,970,637.86
  5. Step 5: Solve for x
    x = 6,970,637.86/3,356.78
  6. Step 6: Final answer
    x = 2,076.59

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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.