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Finding the Fourth Proportional to 308.64, 462.24 and 212.64

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Solution

The fourth proportional to 308.64, 462.24 and 212.64 is: 318.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.64 : 462.24 = 212.64 : x
  2. Step 2: Convert to fraction form
    308.64/462.24 = 212.64/x
  3. Step 3: Cross multiply
    308.64x = 462.24 × 212.64
  4. Step 4: Simplify right side
    308.64x = 98,290.71
  5. Step 5: Solve for x
    x = 98,290.71/308.64
  6. Step 6: Final answer
    x = 318.46

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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.