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Finding the Fourth Proportional to 214.65, 322.25 and 142.83

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Solution

The fourth proportional to 214.65, 322.25 and 142.83 is: 214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.65 : 322.25 = 142.83 : x
  2. Step 2: Convert to fraction form
    214.65/322.25 = 142.83/x
  3. Step 3: Cross multiply
    214.65x = 322.25 × 142.83
  4. Step 4: Simplify right side
    214.65x = 46,026.25
  5. Step 5: Solve for x
    x = 46,026.25/214.65
  6. Step 6: Final answer
    x = 214.42

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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.