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Finding the Fourth Proportional to 225.09, 310.63 and 136.54

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Solution

The fourth proportional to 225.09, 310.63 and 136.54 is: 188.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.09 : 310.63 = 136.54 : x
  2. Step 2: Convert to fraction form
    225.09/310.63 = 136.54/x
  3. Step 3: Cross multiply
    225.09x = 310.63 × 136.54
  4. Step 4: Simplify right side
    225.09x = 42,412.74
  5. Step 5: Solve for x
    x = 42,412.74/225.09
  6. Step 6: Final answer
    x = 188.43

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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.