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Finding the Fourth Proportional to 409.06, 564.50 and 222.55

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Solution

The fourth proportional to 409.06, 564.50 and 222.55 is: 307.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.06 : 564.50 = 222.55 : x
  2. Step 2: Convert to fraction form
    409.06/564.50 = 222.55/x
  3. Step 3: Cross multiply
    409.06x = 564.50 × 222.55
  4. Step 4: Simplify right side
    409.06x = 125,631.09
  5. Step 5: Solve for x
    x = 125,631.09/409.06
  6. Step 6: Final answer
    x = 307.12

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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.