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Finding the Fourth Proportional to 224.47, 309.91 and 137.19

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Solution

The fourth proportional to 224.47, 309.91 and 137.19 is: 189.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.47 : 309.91 = 137.19 : x
  2. Step 2: Convert to fraction form
    224.47/309.91 = 137.19/x
  3. Step 3: Cross multiply
    224.47x = 309.91 × 137.19
  4. Step 4: Simplify right side
    224.47x = 42,516.55
  5. Step 5: Solve for x
    x = 42,516.55/224.47
  6. Step 6: Final answer
    x = 189.41

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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.