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Finding the Fourth Proportional to 305.65, 421.79 and 174.66

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Solution

The fourth proportional to 305.65, 421.79 and 174.66 is: 241.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.65 : 421.79 = 174.66 : x
  2. Step 2: Convert to fraction form
    305.65/421.79 = 174.66/x
  3. Step 3: Cross multiply
    305.65x = 421.79 × 174.66
  4. Step 4: Simplify right side
    305.65x = 73,669.11
  5. Step 5: Solve for x
    x = 73,669.11/305.65
  6. Step 6: Final answer
    x = 241.03

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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.