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Finding the Fourth Proportional to 212.76, 295.02 and 208.80

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Solution

The fourth proportional to 212.76, 295.02 and 208.80 is: 289.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.76 : 295.02 = 208.80 : x
  2. Step 2: Convert to fraction form
    212.76/295.02 = 208.80/x
  3. Step 3: Cross multiply
    212.76x = 295.02 × 208.80
  4. Step 4: Simplify right side
    212.76x = 61,600.18
  5. Step 5: Solve for x
    x = 61,600.18/212.76
  6. Step 6: Final answer
    x = 289.53

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.