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Finding the Fourth Proportional to 225.84, 310 and 221.76

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Solution

The fourth proportional to 225.84, 310 and 221.76 is: 304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.84 : 310 = 221.76 : x
  2. Step 2: Convert to fraction form
    225.84/310 = 221.76/x
  3. Step 3: Cross multiply
    225.84x = 310 × 221.76
  4. Step 4: Simplify right side
    225.84x = 68,745.60
  5. Step 5: Solve for x
    x = 68,745.60/225.84
  6. Step 6: Final answer
    x = 304.40

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.