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Finding the Fourth Proportional to 224.40, 309.52 and 145.81

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Solution

The fourth proportional to 224.40, 309.52 and 145.81 is: 201.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.40 : 309.52 = 145.81 : x
  2. Step 2: Convert to fraction form
    224.40/309.52 = 145.81/x
  3. Step 3: Cross multiply
    224.40x = 309.52 × 145.81
  4. Step 4: Simplify right side
    224.40x = 45,131.11
  5. Step 5: Solve for x
    x = 45,131.11/224.40
  6. Step 6: Final answer
    x = 201.12

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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.