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Finding the Fourth Proportional to 727.41, 1,004.20 and 492.60

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Solution

The fourth proportional to 727.41, 1,004.20 and 492.60 is: 680.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.41 : 1,004.20 = 492.60 : x
  2. Step 2: Convert to fraction form
    727.41/1,004.20 = 492.60/x
  3. Step 3: Cross multiply
    727.41x = 1,004.20 × 492.60
  4. Step 4: Simplify right side
    727.41x = 494,667.69
  5. Step 5: Solve for x
    x = 494,667.69/727.41
  6. Step 6: Final answer
    x = 680.04

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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.