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Finding the Fourth Proportional to 305.72, 422.06 and 236.92

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Solution

The fourth proportional to 305.72, 422.06 and 236.92 is: 327.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.72 : 422.06 = 236.92 : x
  2. Step 2: Convert to fraction form
    305.72/422.06 = 236.92/x
  3. Step 3: Cross multiply
    305.72x = 422.06 × 236.92
  4. Step 4: Simplify right side
    305.72x = 99,994.46
  5. Step 5: Solve for x
    x = 99,994.46/305.72
  6. Step 6: Final answer
    x = 327.08

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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.