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Finding the Fourth Proportional to 210.82, 316.74 and 205.18

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Solution

The fourth proportional to 210.82, 316.74 and 205.18 is: 308.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.82 : 316.74 = 205.18 : x
  2. Step 2: Convert to fraction form
    210.82/316.74 = 205.18/x
  3. Step 3: Cross multiply
    210.82x = 316.74 × 205.18
  4. Step 4: Simplify right side
    210.82x = 64,988.71
  5. Step 5: Solve for x
    x = 64,988.71/210.82
  6. Step 6: Final answer
    x = 308.27

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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.