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Finding the Fourth Proportional to 214.32, 321.36 and 127.40

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Solution

The fourth proportional to 214.32, 321.36 and 127.40 is: 191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.32 : 321.36 = 127.40 : x
  2. Step 2: Convert to fraction form
    214.32/321.36 = 127.40/x
  3. Step 3: Cross multiply
    214.32x = 321.36 × 127.40
  4. Step 4: Simplify right side
    214.32x = 40,941.26
  5. Step 5: Solve for x
    x = 40,941.26/214.32
  6. Step 6: Final answer
    x = 191.03

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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.