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Finding the Fourth Proportional to 307.45, 424.28 and 167.56

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Solution

The fourth proportional to 307.45, 424.28 and 167.56 is: 231.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.45 : 424.28 = 167.56 : x
  2. Step 2: Convert to fraction form
    307.45/424.28 = 167.56/x
  3. Step 3: Cross multiply
    307.45x = 424.28 × 167.56
  4. Step 4: Simplify right side
    307.45x = 71,092.36
  5. Step 5: Solve for x
    x = 71,092.36/307.45
  6. Step 6: Final answer
    x = 231.23

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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.