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Finding the Fourth Proportional to 233.00, 321.54 and 128.09

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Solution

The fourth proportional to 233.00, 321.54 and 128.09 is: 176.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.00 : 321.54 = 128.09 : x
  2. Step 2: Convert to fraction form
    233.00/321.54 = 128.09/x
  3. Step 3: Cross multiply
    233.00x = 321.54 × 128.09
  4. Step 4: Simplify right side
    233.00x = 41,186.86
  5. Step 5: Solve for x
    x = 41,186.86/233.00
  6. Step 6: Final answer
    x = 176.77

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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.