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Finding the Fourth Proportional to 305.66, 421.70 and 181.36

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Solution

The fourth proportional to 305.66, 421.70 and 181.36 is: 250.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.66 : 421.70 = 181.36 : x
  2. Step 2: Convert to fraction form
    305.66/421.70 = 181.36/x
  3. Step 3: Cross multiply
    305.66x = 421.70 × 181.36
  4. Step 4: Simplify right side
    305.66x = 76,479.51
  5. Step 5: Solve for x
    x = 76,479.51/305.66
  6. Step 6: Final answer
    x = 250.21

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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.