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Finding the Fourth Proportional to 1,784.92, 2,678 and 552.28

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Solution

The fourth proportional to 1,784.92, 2,678 and 552.28 is: 828.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.92 : 2,678 = 552.28 : x
  2. Step 2: Convert to fraction form
    1,784.92/2,678 = 552.28/x
  3. Step 3: Cross multiply
    1,784.92x = 2,678 × 552.28
  4. Step 4: Simplify right side
    1,784.92x = 1,479,005.84
  5. Step 5: Solve for x
    x = 1,479,005.84/1,784.92
  6. Step 6: Final answer
    x = 828.61

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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.