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Finding the Fourth Proportional to 224.63, 310.05 and 137.28

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Solution

The fourth proportional to 224.63, 310.05 and 137.28 is: 189.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.63 : 310.05 = 137.28 : x
  2. Step 2: Convert to fraction form
    224.63/310.05 = 137.28/x
  3. Step 3: Cross multiply
    224.63x = 310.05 × 137.28
  4. Step 4: Simplify right side
    224.63x = 42,563.66
  5. Step 5: Solve for x
    x = 42,563.66/224.63
  6. Step 6: Final answer
    x = 189.49

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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.