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Finding the Fourth Proportional to 214.30, 321.52 and 153.38

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Solution

The fourth proportional to 214.30, 321.52 and 153.38 is: 230.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.30 : 321.52 = 153.38 : x
  2. Step 2: Convert to fraction form
    214.30/321.52 = 153.38/x
  3. Step 3: Cross multiply
    214.30x = 321.52 × 153.38
  4. Step 4: Simplify right side
    214.30x = 49,314.74
  5. Step 5: Solve for x
    x = 49,314.74/214.30
  6. Step 6: Final answer
    x = 230.12

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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.