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Finding the Fourth Proportional to 214.75, 320.20 and 212.02

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Solution

The fourth proportional to 214.75, 320.20 and 212.02 is: 316.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.75 : 320.20 = 212.02 : x
  2. Step 2: Convert to fraction form
    214.75/320.20 = 212.02/x
  3. Step 3: Cross multiply
    214.75x = 320.20 × 212.02
  4. Step 4: Simplify right side
    214.75x = 67,888.80
  5. Step 5: Solve for x
    x = 67,888.80/214.75
  6. Step 6: Final answer
    x = 316.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.