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Finding the Fourth Proportional to 229.28, 315.43 and 225.02

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Solution

The fourth proportional to 229.28, 315.43 and 225.02 is: 309.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.28 : 315.43 = 225.02 : x
  2. Step 2: Convert to fraction form
    229.28/315.43 = 225.02/x
  3. Step 3: Cross multiply
    229.28x = 315.43 × 225.02
  4. Step 4: Simplify right side
    229.28x = 70,978.28
  5. Step 5: Solve for x
    x = 70,978.28/229.28
  6. Step 6: Final answer
    x = 309.58

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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.