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Finding the Fourth Proportional to 210.80, 316.18 and 73.82

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Solution

The fourth proportional to 210.80, 316.18 and 73.82 is: 110.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.80 : 316.18 = 73.82 : x
  2. Step 2: Convert to fraction form
    210.80/316.18 = 73.82/x
  3. Step 3: Cross multiply
    210.80x = 316.18 × 73.82
  4. Step 4: Simplify right side
    210.80x = 23,340.41
  5. Step 5: Solve for x
    x = 23,340.41/210.80
  6. Step 6: Final answer
    x = 110.72

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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.