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Finding the Fourth Proportional to 307.43, 424.26 and 167.55

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Solution

The fourth proportional to 307.43, 424.26 and 167.55 is: 231.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.43 : 424.26 = 167.55 : x
  2. Step 2: Convert to fraction form
    307.43/424.26 = 167.55/x
  3. Step 3: Cross multiply
    307.43x = 424.26 × 167.55
  4. Step 4: Simplify right side
    307.43x = 71,084.76
  5. Step 5: Solve for x
    x = 71,084.76/307.43
  6. Step 6: Final answer
    x = 231.22

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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.