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Finding the Fourth Proportional to 442.91, 664.53 and 214.75

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Solution

The fourth proportional to 442.91, 664.53 and 214.75 is: 322.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.91 : 664.53 = 214.75 : x
  2. Step 2: Convert to fraction form
    442.91/664.53 = 214.75/x
  3. Step 3: Cross multiply
    442.91x = 664.53 × 214.75
  4. Step 4: Simplify right side
    442.91x = 142,707.82
  5. Step 5: Solve for x
    x = 142,707.82/442.91
  6. Step 6: Final answer
    x = 322.21

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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.