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Finding the Fourth Proportional to 307.44, 461.32 and 145.14

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Solution

The fourth proportional to 307.44, 461.32 and 145.14 is: 217.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.44 : 461.32 = 145.14 : x
  2. Step 2: Convert to fraction form
    307.44/461.32 = 145.14/x
  3. Step 3: Cross multiply
    307.44x = 461.32 × 145.14
  4. Step 4: Simplify right side
    307.44x = 66,955.98
  5. Step 5: Solve for x
    x = 66,955.98/307.44
  6. Step 6: Final answer
    x = 217.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.