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Finding the Fourth Proportional to 214.20, 296.46 and 208.80

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Solution

The fourth proportional to 214.20, 296.46 and 208.80 is: 288.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.20 : 296.46 = 208.80 : x
  2. Step 2: Convert to fraction form
    214.20/296.46 = 208.80/x
  3. Step 3: Cross multiply
    214.20x = 296.46 × 208.80
  4. Step 4: Simplify right side
    214.20x = 61,900.85
  5. Step 5: Solve for x
    x = 61,900.85/214.20
  6. Step 6: Final answer
    x = 288.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.