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Finding the Fourth Proportional to 727.92, 1,004.54 and 396.35

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Solution

The fourth proportional to 727.92, 1,004.54 and 396.35 is: 546.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.92 : 1,004.54 = 396.35 : x
  2. Step 2: Convert to fraction form
    727.92/1,004.54 = 396.35/x
  3. Step 3: Cross multiply
    727.92x = 1,004.54 × 396.35
  4. Step 4: Simplify right side
    727.92x = 398,145.93
  5. Step 5: Solve for x
    x = 398,145.93/727.92
  6. Step 6: Final answer
    x = 546.96

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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.