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Finding the Fourth Proportional to 214.15, 321.64 and 204.53

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Solution

The fourth proportional to 214.15, 321.64 and 204.53 is: 307.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.15 : 321.64 = 204.53 : x
  2. Step 2: Convert to fraction form
    214.15/321.64 = 204.53/x
  3. Step 3: Cross multiply
    214.15x = 321.64 × 204.53
  4. Step 4: Simplify right side
    214.15x = 65,782.91
  5. Step 5: Solve for x
    x = 65,782.91/214.15
  6. Step 6: Final answer
    x = 307.19

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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.