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Finding the Fourth Proportional to 409.40, 564.96 and 222.89

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Solution

The fourth proportional to 409.40, 564.96 and 222.89 is: 307.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.40 : 564.96 = 222.89 : x
  2. Step 2: Convert to fraction form
    409.40/564.96 = 222.89/x
  3. Step 3: Cross multiply
    409.40x = 564.96 × 222.89
  4. Step 4: Simplify right side
    409.40x = 125,925.35
  5. Step 5: Solve for x
    x = 125,925.35/409.40
  6. Step 6: Final answer
    x = 307.58

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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.