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Finding the Fourth Proportional to 485.94, 727.86 and 254.46

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Solution

The fourth proportional to 485.94, 727.86 and 254.46 is: 381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.94 : 727.86 = 254.46 : x
  2. Step 2: Convert to fraction form
    485.94/727.86 = 254.46/x
  3. Step 3: Cross multiply
    485.94x = 727.86 × 254.46
  4. Step 4: Simplify right side
    485.94x = 185,211.26
  5. Step 5: Solve for x
    x = 185,211.26/485.94
  6. Step 6: Final answer
    x = 381.14

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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.