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Finding the Fourth Proportional to 215.33, 322.38 and 141.98

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Solution

The fourth proportional to 215.33, 322.38 and 141.98 is: 212.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.33 : 322.38 = 141.98 : x
  2. Step 2: Convert to fraction form
    215.33/322.38 = 141.98/x
  3. Step 3: Cross multiply
    215.33x = 322.38 × 141.98
  4. Step 4: Simplify right side
    215.33x = 45,769.90
  5. Step 5: Solve for x
    x = 45,769.90/215.33
  6. Step 6: Final answer
    x = 212.56

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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.