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Finding the Fourth Proportional to 233.25, 321.91 and 145.91

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Solution

The fourth proportional to 233.25, 321.91 and 145.91 is: 201.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.25 : 321.91 = 145.91 : x
  2. Step 2: Convert to fraction form
    233.25/321.91 = 145.91/x
  3. Step 3: Cross multiply
    233.25x = 321.91 × 145.91
  4. Step 4: Simplify right side
    233.25x = 46,968.28
  5. Step 5: Solve for x
    x = 46,968.28/233.25
  6. Step 6: Final answer
    x = 201.36

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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.