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Finding the Fourth Proportional to 223.65, 308.61 and 140.83

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Solution

The fourth proportional to 223.65, 308.61 and 140.83 is: 194.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.65 : 308.61 = 140.83 : x
  2. Step 2: Convert to fraction form
    223.65/308.61 = 140.83/x
  3. Step 3: Cross multiply
    223.65x = 308.61 × 140.83
  4. Step 4: Simplify right side
    223.65x = 43,460.77
  5. Step 5: Solve for x
    x = 43,460.77/223.65
  6. Step 6: Final answer
    x = 194.32

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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.