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Finding the Fourth Proportional to 225, 336.96 and 188.64

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Solution

The fourth proportional to 225, 336.96 and 188.64 is: 282.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    225 : 336.96 = 188.64 : x
  2. Step 2: Convert to fraction form
    225/336.96 = 188.64/x
  3. Step 3: Cross multiply
    225x = 336.96 × 188.64
  4. Step 4: Simplify right side
    225x = 63,564.13
  5. Step 5: Solve for x
    x = 63,564.13/225
  6. Step 6: Final answer
    x = 282.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.