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Finding the Fourth Proportional to 485.23, 727.17 and 265.86

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Solution

The fourth proportional to 485.23, 727.17 and 265.86 is: 398.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.23 : 727.17 = 265.86 : x
  2. Step 2: Convert to fraction form
    485.23/727.17 = 265.86/x
  3. Step 3: Cross multiply
    485.23x = 727.17 × 265.86
  4. Step 4: Simplify right side
    485.23x = 193,325.42
  5. Step 5: Solve for x
    x = 193,325.42/485.23
  6. Step 6: Final answer
    x = 398.42

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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.