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Finding the Fourth Proportional to 225.05, 310.20 and 190.42

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Solution

The fourth proportional to 225.05, 310.20 and 190.42 is: 262.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.05 : 310.20 = 190.42 : x
  2. Step 2: Convert to fraction form
    225.05/310.20 = 190.42/x
  3. Step 3: Cross multiply
    225.05x = 310.20 × 190.42
  4. Step 4: Simplify right side
    225.05x = 59,066.79
  5. Step 5: Solve for x
    x = 59,066.79/225.05
  6. Step 6: Final answer
    x = 262.47

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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.