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Finding the Fourth Proportional to 485.08, 727.92 and 211.24

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Solution

The fourth proportional to 485.08, 727.92 and 211.24 is: 316.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.08 : 727.92 = 211.24 : x
  2. Step 2: Convert to fraction form
    485.08/727.92 = 211.24/x
  3. Step 3: Cross multiply
    485.08x = 727.92 × 211.24
  4. Step 4: Simplify right side
    485.08x = 153,765.82
  5. Step 5: Solve for x
    x = 153,765.82/485.08
  6. Step 6: Final answer
    x = 316.99

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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.