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Finding the Fourth Proportional to 388.27, 535.71 and 222.52

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Solution

The fourth proportional to 388.27, 535.71 and 222.52 is: 307.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.27 : 535.71 = 222.52 : x
  2. Step 2: Convert to fraction form
    388.27/535.71 = 222.52/x
  3. Step 3: Cross multiply
    388.27x = 535.71 × 222.52
  4. Step 4: Simplify right side
    388.27x = 119,206.19
  5. Step 5: Solve for x
    x = 119,206.19/388.27
  6. Step 6: Final answer
    x = 307.02

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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.