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Finding the Fourth Proportional to 233.40, 321.91 and 223.06

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Solution

The fourth proportional to 233.40, 321.91 and 223.06 is: 307.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.40 : 321.91 = 223.06 : x
  2. Step 2: Convert to fraction form
    233.40/321.91 = 223.06/x
  3. Step 3: Cross multiply
    233.40x = 321.91 × 223.06
  4. Step 4: Simplify right side
    233.40x = 71,805.00
  5. Step 5: Solve for x
    x = 71,805.00/233.40
  6. Step 6: Final answer
    x = 307.65

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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.