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Finding the Fourth Proportional to 409.10, 564.55 and 222.59

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Solution

The fourth proportional to 409.10, 564.55 and 222.59 is: 307.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.10 : 564.55 = 222.59 : x
  2. Step 2: Convert to fraction form
    409.10/564.55 = 222.59/x
  3. Step 3: Cross multiply
    409.10x = 564.55 × 222.59
  4. Step 4: Simplify right side
    409.10x = 125,659.25
  5. Step 5: Solve for x
    x = 125,659.25/409.10
  6. Step 6: Final answer
    x = 307.16

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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.