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Finding the Fourth Proportional to 216.34, 322.43 and 214.55

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Solution

The fourth proportional to 216.34, 322.43 and 214.55 is: 319.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.34 : 322.43 = 214.55 : x
  2. Step 2: Convert to fraction form
    216.34/322.43 = 214.55/x
  3. Step 3: Cross multiply
    216.34x = 322.43 × 214.55
  4. Step 4: Simplify right side
    216.34x = 69,177.36
  5. Step 5: Solve for x
    x = 69,177.36/216.34
  6. Step 6: Final answer
    x = 319.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.