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Finding the Fourth Proportional to 309.80, 427.47 and 176.99

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Solution

The fourth proportional to 309.80, 427.47 and 176.99 is: 244.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.80 : 427.47 = 176.99 : x
  2. Step 2: Convert to fraction form
    309.80/427.47 = 176.99/x
  3. Step 3: Cross multiply
    309.80x = 427.47 × 176.99
  4. Step 4: Simplify right side
    309.80x = 75,658.98
  5. Step 5: Solve for x
    x = 75,658.98/309.80
  6. Step 6: Final answer
    x = 244.22

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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.