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Finding the Fourth Proportional to 309.99, 427.82 and 177.24

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Solution

The fourth proportional to 309.99, 427.82 and 177.24 is: 244.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.99 : 427.82 = 177.24 : x
  2. Step 2: Convert to fraction form
    309.99/427.82 = 177.24/x
  3. Step 3: Cross multiply
    309.99x = 427.82 × 177.24
  4. Step 4: Simplify right side
    309.99x = 75,825.93
  5. Step 5: Solve for x
    x = 75,825.93/309.99
  6. Step 6: Final answer
    x = 244.61

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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.