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Finding the Fourth Proportional to 272.02, 407.02 and 213.80

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Solution

The fourth proportional to 272.02, 407.02 and 213.80 is: 319.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.02 : 407.02 = 213.80 : x
  2. Step 2: Convert to fraction form
    272.02/407.02 = 213.80/x
  3. Step 3: Cross multiply
    272.02x = 407.02 × 213.80
  4. Step 4: Simplify right side
    272.02x = 87,020.88
  5. Step 5: Solve for x
    x = 87,020.88/272.02
  6. Step 6: Final answer
    x = 319.91

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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.