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Finding the Fourth Proportional to 225.29, 310.70 and 142.25

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Solution

The fourth proportional to 225.29, 310.70 and 142.25 is: 196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.29 : 310.70 = 142.25 : x
  2. Step 2: Convert to fraction form
    225.29/310.70 = 142.25/x
  3. Step 3: Cross multiply
    225.29x = 310.70 × 142.25
  4. Step 4: Simplify right side
    225.29x = 44,197.72
  5. Step 5: Solve for x
    x = 44,197.72/225.29
  6. Step 6: Final answer
    x = 196.18

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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.