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Finding the Fourth Proportional to 347.12, 479.18 and 222.78

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Solution

The fourth proportional to 347.12, 479.18 and 222.78 is: 307.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.12 : 479.18 = 222.78 : x
  2. Step 2: Convert to fraction form
    347.12/479.18 = 222.78/x
  3. Step 3: Cross multiply
    347.12x = 479.18 × 222.78
  4. Step 4: Simplify right side
    347.12x = 106,754.07
  5. Step 5: Solve for x
    x = 106,754.07/347.12
  6. Step 6: Final answer
    x = 307.54

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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.