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Finding the Fourth Proportional to 485.11, 727.53 and 331.00

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Solution

The fourth proportional to 485.11, 727.53 and 331.00 is: 496.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.11 : 727.53 = 331.00 : x
  2. Step 2: Convert to fraction form
    485.11/727.53 = 331.00/x
  3. Step 3: Cross multiply
    485.11x = 727.53 × 331.00
  4. Step 4: Simplify right side
    485.11x = 240,812.59
  5. Step 5: Solve for x
    x = 240,812.59/485.11
  6. Step 6: Final answer
    x = 496.41

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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.