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Finding the Fourth Proportional to 214.77, 322.77 and 143.09

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Solution

The fourth proportional to 214.77, 322.77 and 143.09 is: 215.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.77 : 322.77 = 143.09 : x
  2. Step 2: Convert to fraction form
    214.77/322.77 = 143.09/x
  3. Step 3: Cross multiply
    214.77x = 322.77 × 143.09
  4. Step 4: Simplify right side
    214.77x = 46,183.55
  5. Step 5: Solve for x
    x = 46,183.55/214.77
  6. Step 6: Final answer
    x = 215.04

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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.