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Finding the Fourth Proportional to 215.01, 322.09 and 141.82

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Solution

The fourth proportional to 215.01, 322.09 and 141.82 is: 212.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.01 : 322.09 = 141.82 : x
  2. Step 2: Convert to fraction form
    215.01/322.09 = 141.82/x
  3. Step 3: Cross multiply
    215.01x = 322.09 × 141.82
  4. Step 4: Simplify right side
    215.01x = 45,678.80
  5. Step 5: Solve for x
    x = 45,678.80/215.01
  6. Step 6: Final answer
    x = 212.45

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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.