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Finding the Fourth Proportional to 309.45, 427.03 and 169.57

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Solution

The fourth proportional to 309.45, 427.03 and 169.57 is: 234.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.45 : 427.03 = 169.57 : x
  2. Step 2: Convert to fraction form
    309.45/427.03 = 169.57/x
  3. Step 3: Cross multiply
    309.45x = 427.03 × 169.57
  4. Step 4: Simplify right side
    309.45x = 72,409.99
  5. Step 5: Solve for x
    x = 72,409.99/309.45
  6. Step 6: Final answer
    x = 234.00

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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.