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Finding the Fourth Proportional to 388.01, 535.43 and 222.23

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Solution

The fourth proportional to 388.01, 535.43 and 222.23 is: 306.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.01 : 535.43 = 222.23 : x
  2. Step 2: Convert to fraction form
    388.01/535.43 = 222.23/x
  3. Step 3: Cross multiply
    388.01x = 535.43 × 222.23
  4. Step 4: Simplify right side
    388.01x = 118,984.82
  5. Step 5: Solve for x
    x = 118,984.82/388.01
  6. Step 6: Final answer
    x = 306.66

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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.