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Finding the Fourth Proportional to 225.30, 310.86 and 137.94

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Solution

The fourth proportional to 225.30, 310.86 and 137.94 is: 190.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.30 : 310.86 = 137.94 : x
  2. Step 2: Convert to fraction form
    225.30/310.86 = 137.94/x
  3. Step 3: Cross multiply
    225.30x = 310.86 × 137.94
  4. Step 4: Simplify right side
    225.30x = 42,880.03
  5. Step 5: Solve for x
    x = 42,880.03/225.30
  6. Step 6: Final answer
    x = 190.32

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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.