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Finding the Fourth Proportional to 231.29, 319.16 and 133.04

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Solution

The fourth proportional to 231.29, 319.16 and 133.04 is: 183.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.29 : 319.16 = 133.04 : x
  2. Step 2: Convert to fraction form
    231.29/319.16 = 133.04/x
  3. Step 3: Cross multiply
    231.29x = 319.16 × 133.04
  4. Step 4: Simplify right side
    231.29x = 42,461.05
  5. Step 5: Solve for x
    x = 42,461.05/231.29
  6. Step 6: Final answer
    x = 183.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.