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Finding the Fourth Proportional to 214.28, 295.70 and 136.68

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Solution

The fourth proportional to 214.28, 295.70 and 136.68 is: 188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.28 : 295.70 = 136.68 : x
  2. Step 2: Convert to fraction form
    214.28/295.70 = 136.68/x
  3. Step 3: Cross multiply
    214.28x = 295.70 × 136.68
  4. Step 4: Simplify right side
    214.28x = 40,416.28
  5. Step 5: Solve for x
    x = 40,416.28/214.28
  6. Step 6: Final answer
    x = 188.61

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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.