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Finding the Fourth Proportional to 221.06, 304.88 and 186.50

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Solution

The fourth proportional to 221.06, 304.88 and 186.50 is: 257.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.06 : 304.88 = 186.50 : x
  2. Step 2: Convert to fraction form
    221.06/304.88 = 186.50/x
  3. Step 3: Cross multiply
    221.06x = 304.88 × 186.50
  4. Step 4: Simplify right side
    221.06x = 56,860.12
  5. Step 5: Solve for x
    x = 56,860.12/221.06
  6. Step 6: Final answer
    x = 257.22

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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.