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Finding the Fourth Proportional to 307.26, 423.99 and 176.31

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Solution

The fourth proportional to 307.26, 423.99 and 176.31 is: 243.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.26 : 423.99 = 176.31 : x
  2. Step 2: Convert to fraction form
    307.26/423.99 = 176.31/x
  3. Step 3: Cross multiply
    307.26x = 423.99 × 176.31
  4. Step 4: Simplify right side
    307.26x = 74,753.68
  5. Step 5: Solve for x
    x = 74,753.68/307.26
  6. Step 6: Final answer
    x = 243.29

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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.