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Finding the Fourth Proportional to 347.22, 478.88 and 222.88

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Solution

The fourth proportional to 347.22, 478.88 and 222.88 is: 307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.22 : 478.88 = 222.88 : x
  2. Step 2: Convert to fraction form
    347.22/478.88 = 222.88/x
  3. Step 3: Cross multiply
    347.22x = 478.88 × 222.88
  4. Step 4: Simplify right side
    347.22x = 106,732.77
  5. Step 5: Solve for x
    x = 106,732.77/347.22
  6. Step 6: Final answer
    x = 307.39

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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.