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Finding the Fourth Proportional to 214.39, 321.25 and 156.35

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Solution

The fourth proportional to 214.39, 321.25 and 156.35 is: 234.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.39 : 321.25 = 156.35 : x
  2. Step 2: Convert to fraction form
    214.39/321.25 = 156.35/x
  3. Step 3: Cross multiply
    214.39x = 321.25 × 156.35
  4. Step 4: Simplify right side
    214.39x = 50,225.05
  5. Step 5: Solve for x
    x = 50,225.05/214.39
  6. Step 6: Final answer
    x = 234.27

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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.