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Finding the Fourth Proportional to 305.84, 422.16 and 228.26

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Solution

The fourth proportional to 305.84, 422.16 and 228.26 is: 315.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.84 : 422.16 = 228.26 : x
  2. Step 2: Convert to fraction form
    305.84/422.16 = 228.26/x
  3. Step 3: Cross multiply
    305.84x = 422.16 × 228.26
  4. Step 4: Simplify right side
    305.84x = 96,362.24
  5. Step 5: Solve for x
    x = 96,362.24/305.84
  6. Step 6: Final answer
    x = 315.07

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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.