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Finding the Fourth Proportional to 387.94, 535.34 and 222.14

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Solution

The fourth proportional to 387.94, 535.34 and 222.14 is: 306.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.94 : 535.34 = 222.14 : x
  2. Step 2: Convert to fraction form
    387.94/535.34 = 222.14/x
  3. Step 3: Cross multiply
    387.94x = 535.34 × 222.14
  4. Step 4: Simplify right side
    387.94x = 118,920.43
  5. Step 5: Solve for x
    x = 118,920.43/387.94
  6. Step 6: Final answer
    x = 306.54

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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.